Add schema-utils 3.0, mkdirp 1.0 and loader-utils 2.0 to package.json

to ensure compatibility with packaged modules (See #976310)

debian/patches/0740-use-packaged-modules.patch

@@ -3,6 +3,8 @@ Use debian packaged node modules when available
  - Remove webpack-bundle-analyzer
  - Resolve .json files
  - Add more plugins to babel.config.js
+ - Add schema-utils 3.0, mkdirp 1.0 and loader-utils 2.0 to ensure compatibility
+   for packaged modules (See #976310)
 
 --- a/config/webpack.config.js
 +++ b/config/webpack.config.js
@@ -119,7 +121,7 @@ Use debian packaged node modules when available
      "diff": "^3.4.0",
      "document-register-element": "1.14.3",
      "dompurify": "^2.0.11",
-@@ -85,29 +62,18 @@
+@@ -85,81 +62,55 @@
      "editorconfig": "^0.15.3",
      "emoji-regex": "^7.0.3",
      "emoji-unicode-version": "^0.2.1",
@@ -146,10 +148,14 @@ Use debian packaged node modules when available
 -    "jszip-utils": "^0.0.2",
      "katex": "^0.10.0",
 -    "lodash": "^4.17.20",
++    "loader-utils": "^2.0.0",
      "marked": "^0.3.12",
      "mermaid": "^8.5.2",
      "mersenne-twister": "1.1.0",
-@@ -117,49 +83,31 @@
+     "minimatch": "^3.0.4",
+     "miragejs": "^0.1.40",
++    "mkdirp": "^1.0.4",
+     "mock-apollo-client": "^0.4.0",
      "monaco-editor": "^0.20.0",
      "monaco-editor-webpack-plugin": "^1.9.0",
      "monaco-yaml": "^2.4.1",
@@ -162,6 +168,7 @@ Use debian packaged node modules when available
 -    "prosemirror-model": "^1.6.4",
      "raphael": "^2.2.7",
 -    "raw-loader": "^4.0.0",
++    "schema-utils": "^3.0.0",
      "select2": "3.5.2-browserify",
      "smooshpack": "^0.0.62",
      "sortablejs": "^1.10.2",