Upgrade dependencies

package.json

@@ -27,24 +27,24 @@
     "dist"
   ],
   "devDependencies": {
-    "@babel/core": "^7.9.0",
-    "@babel/plugin-proposal-class-properties": "^7.8.3",
-    "@babel/plugin-transform-react-jsx": "^7.9.4",
-    "@babel/preset-env": "^7.9.5",
-    "concurrently": "^5.1.0",
-    "copyfiles": "^2.2.0",
+    "@babel/core": "^7.11.0",
+    "@babel/plugin-proposal-class-properties": "^7.10.4",
+    "@babel/plugin-transform-react-jsx": "^7.10.4",
+    "@babel/preset-env": "^7.11.0",
+    "concurrently": "^5.2.0",
+    "copyfiles": "^2.3.0",
     "cross-env": "^7.0.2",
     "husky": "^4.2.5",
-    "preact": "^10.4.0",
-    "prettier": "^2.0.4",
+    "preact": "^10.4.6",
+    "prettier": "^2.0.5",
     "pretty-quick": "^2.0.1",
     "rimraf": "^3.0.2",
-    "rollup": "^2.6.1",
+    "rollup": "^2.23.0",
     "rollup-plugin-babel": "^4.4.0",
     "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-postcss": "^2.6.4",
-    "rollup-plugin-terser": "^5.3.0",
-    "serve": "^11.3.0"
+    "rollup-plugin-postcss": "^3.1.3",
+    "rollup-plugin-terser": "^6.1.0",
+    "serve": "^11.3.2"
   },
   "dependencies": {}
 }