chore: apply fixes from npm audit (#35210)

- [x] I have read [freeCodeCamp's contribution guidelines](https://github.com/freeCodeCamp/freeCodeCamp/blob/master/CONTRIBUTING.md).
- [x] My pull request has a descriptive title (not a vague title like `Update index.md`)
- [x] My pull request targets the `master` branch of freeCodeCamp.

client/package.json

@@ -23,8 +23,8 @@
     "enzyme": "^3.6.0",
     "enzyme-adapter-react-16": "^1.5.0",
     "fetchr": "^0.5.37",
-    "gatsby": "^2.0.91",
-    "gatsby-cli": "^2.4.8",
+    "gatsby": "^2.1.2",
+    "gatsby-cli": "^2.4.10",
     "gatsby-link": "^2.0.8",
     "gatsby-plugin-create-client-paths": "^2.0.3",
     "gatsby-plugin-google-fonts": "^0.0.4",
@@ -35,7 +35,7 @@
     "gatsby-source-filesystem": "^2.0.16",
     "gatsby-transformer-remark": "^2.2.0",
     "jquery": "3.3.1",
-    "lodash": "^4.17.10",
+    "lodash": "^4.17.11",
     "loop-protect": "^2.1.6",
     "monaco-editor-webpack-plugin": "^1.5.4",
     "nanoid": "^1.2.2",
@@ -87,7 +87,7 @@
     "babel-plugin-transform-imports": "^1.5.0",
     "chokidar": "^2.0.4",
     "copy-webpack-plugin": "^4.6.0",
-    "eslint": "^5.5.0",
+    "eslint": "^5.13.0",
     "eslint-config-freecodecamp": "^1.1.1",
     "jest": "^23.6.0",
     "prettier": "^1.14.2",