diff --git a/node_modules/safe-buffer/index.js b/node_modules/safe-buffer/index.js
index 22438dabbbcee..f8d3ec98852f4 100644
--- a/node_modules/safe-buffer/index.js
+++ b/node_modules/safe-buffer/index.js
@@ -1,3 +1,4 @@
+/*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
 /* eslint-disable node/no-deprecated-api */
 var buffer = require('buffer')
 var Buffer = buffer.Buffer
@@ -20,6 +21,8 @@ function SafeBuffer (arg, encodingOrOffset, length) {
   return Buffer(arg, encodingOrOffset, length)
 }
 
+SafeBuffer.prototype = Object.create(Buffer.prototype)
+
 // Copy static methods from Buffer
 copyProps(Buffer, SafeBuffer)
 
diff --git a/node_modules/safe-buffer/package.json b/node_modules/safe-buffer/package.json
index 623fbc3f6b0c4..f2869e256477a 100644
--- a/node_modules/safe-buffer/package.json
+++ b/node_modules/safe-buffer/package.json
@@ -1,18 +1,18 @@
 {
   "name": "safe-buffer",
   "description": "Safer Node.js Buffer API",
-  "version": "5.1.2",
+  "version": "5.2.1",
   "author": {
     "name": "Feross Aboukhadijeh",
     "email": "feross@feross.org",
-    "url": "http://feross.org"
+    "url": "https://feross.org"
   },
   "bugs": {
     "url": "https://github.com/feross/safe-buffer/issues"
   },
   "devDependencies": {
     "standard": "*",
-    "tape": "^4.0.0"
+    "tape": "^5.0.0"
   },
   "homepage": "https://github.com/feross/safe-buffer",
   "keywords": [
@@ -33,5 +33,19 @@
   },
   "scripts": {
     "test": "standard && tape test/*.js"
-  }
+  },
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/feross"
+    },
+    {
+      "type": "patreon",
+      "url": "https://www.patreon.com/feross"
+    },
+    {
+      "type": "consulting",
+      "url": "https://feross.org/support"
+    }
+  ]
 }
diff --git a/node_modules/string_decoder/package.json b/node_modules/string_decoder/package.json
index 518c3eb9fb1ff..b2bb141160cad 100644
--- a/node_modules/string_decoder/package.json
+++ b/node_modules/string_decoder/package.json
@@ -1,10 +1,13 @@
 {
   "name": "string_decoder",
-  "version": "1.1.1",
+  "version": "1.3.0",
   "description": "The string_decoder module from Node core",
   "main": "lib/string_decoder.js",
+  "files": [
+    "lib"
+  ],
   "dependencies": {
-    "safe-buffer": "~5.1.0"
+    "safe-buffer": "~5.2.0"
   },
   "devDependencies": {
     "babel-polyfill": "^6.23.0",
diff --git a/package-lock.json b/package-lock.json
index 297ce2e9d9f3b..d0bd88d963c0c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1675,12 +1675,27 @@
         "util-deprecate": "~1.0.1"
       }
     },
+    "node_modules/@lerna/collect-updates/node_modules/safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "dev": true
+    },
     "node_modules/@lerna/collect-updates/node_modules/signal-exit": {
       "version": "3.0.7",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz",
       "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
       "dev": true
     },
+    "node_modules/@lerna/collect-updates/node_modules/string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "dev": true,
+      "dependencies": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
     "node_modules/@lerna/collect-updates/node_modules/string-width": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
@@ -1800,12 +1815,27 @@
         "util-deprecate": "~1.0.1"
       }
     },
+    "node_modules/@lerna/describe-ref/node_modules/safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "dev": true
+    },
     "node_modules/@lerna/describe-ref/node_modules/signal-exit": {
       "version": "3.0.7",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz",
       "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
       "dev": true
     },
+    "node_modules/@lerna/describe-ref/node_modules/string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "dev": true,
+      "dependencies": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
     "node_modules/@lerna/describe-ref/node_modules/string-width": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
@@ -1986,12 +2016,27 @@
         "util-deprecate": "~1.0.1"
       }
     },
+    "node_modules/@lerna/package-graph/node_modules/safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "dev": true
+    },
     "node_modules/@lerna/package-graph/node_modules/signal-exit": {
       "version": "3.0.7",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz",
       "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
       "dev": true
     },
+    "node_modules/@lerna/package-graph/node_modules/string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "dev": true,
+      "dependencies": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
     "node_modules/@lerna/package-graph/node_modules/string-width": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
@@ -2209,12 +2254,27 @@
         "util-deprecate": "~1.0.1"
       }
     },
+    "node_modules/@lerna/validation-error/node_modules/safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "dev": true
+    },
     "node_modules/@lerna/validation-error/node_modules/signal-exit": {
       "version": "3.0.7",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz",
       "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
       "dev": true
     },
+    "node_modules/@lerna/validation-error/node_modules/string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "dev": true,
+      "dependencies": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
     "node_modules/@lerna/validation-error/node_modules/string-width": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
@@ -11340,9 +11400,23 @@
       }
     },
     "node_modules/safe-buffer": {
-      "version": "5.1.2",
-      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
       "inBundle": true
     },
     "node_modules/safe-regex-test": {
@@ -11794,12 +11868,12 @@
       }
     },
     "node_modules/string_decoder": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
-      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
       "inBundle": true,
       "dependencies": {
-        "safe-buffer": "~5.1.0"
+        "safe-buffer": "~5.2.0"
       }
     },
     "node_modules/string-width": {