fix: docs/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908
- https://snyk.io/vuln/SNYK-JS-AXIOS-1038255
- https://snyk.io/vuln/SNYK-JS-AXIOS-1579269
- https://snyk.io/vuln/SNYK-JS-BABELTRAVERSE-5962462
- https://snyk.io/vuln/SNYK-JS-DECODEURICOMPONENT-3149970
- https://snyk.io/vuln/SNYK-JS-FOLLOWREDIRECTS-2332181
- https://snyk.io/vuln/SNYK-JS-FOLLOWREDIRECTS-2396346
- https://snyk.io/vuln/SNYK-JS-GLOBPARENT-1016905
- https://snyk.io/vuln/SNYK-JS-HIGHLIGHTJS-1045326
- https://snyk.io/vuln/SNYK-JS-JSON5-3182856
- https://snyk.io/vuln/SNYK-JS-JSONSCHEMA-1920922
- https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3042992
- https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3043105
- https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3105943
- https://snyk.io/vuln/SNYK-JS-MINIMATCH-3050818
- https://snyk.io/vuln/SNYK-JS-MINIMIST-2429795
- https://snyk.io/vuln/SNYK-JS-NODEFETCH-2342118
- https://snyk.io/vuln/SNYK-JS-OBJECTPATH-1569453
- https://snyk.io/vuln/SNYK-JS-OBJECTPATH-1585658
- https://snyk.io/vuln/SNYK-JS-PARSEURL-2935944
- https://snyk.io/vuln/SNYK-JS-PARSEURL-2935947
- https://snyk.io/vuln/SNYK-JS-PARSEURL-2936249
- https://snyk.io/vuln/SNYK-JS-PARSEURL-2942134
- https://snyk.io/vuln/SNYK-JS-PATHPARSE-1077067
- https://snyk.io/vuln/SNYK-JS-QS-3153490
- https://snyk.io/vuln/SNYK-JS-SEMVER-3247795
- https://snyk.io/vuln/SNYK-JS-WS-1296835
- https://snyk.io/vuln/npm:debug:20170905

docs/package.json

@@ -14,7 +14,7 @@
     "antd": "^4.8.0",
     "docz": "^2.3.1",
     "emotion": "^10.0.27",
-    "gatsby": "^2.25.3",
+    "gatsby": "^4.22.0",
     "gatsby-dynamical-navigation": "^0.4.1",
     "gatsby-image": "^2.4.21",
     "gatsby-plugin-antd": "^2.2.0",
@@ -26,11 +26,11 @@
     "gatsby-plugin-react-helmet": "^3.3.14",
     "gatsby-plugin-remove-serviceworker": "^1.0.0",
     "gatsby-plugin-sass": "^3.2.0",
-    "gatsby-plugin-sharp": "^2.7.1",
+    "gatsby-plugin-sharp": "^3.15.0",
     "gatsby-source-filesystem": "^2.4.2",
     "gatsby-theme-docz": "^2.3.1",
-    "gatsby-transformer-sharp": "^2.5.21",
-    "node-sass": "^6.0.1",
+    "gatsby-transformer-sharp": "^2.11.0",
+    "node-sass": "^7.0.2",
     "prop-types": "^15.7.2",
     "react": "^16.14.0",
     "react-dom": "^16.14.0",