Use npm instead of yarn

Author: pluma

.github/workflows/docs.yml

@@ -25,7 +25,7 @@ jobs:
           ref: gh-pages
           path: gh-pages
 
-      - run: yarn
+      - run: npm install
 
       - name: Set TAG env to devel
         if: startsWith( github.event.ref, 'refs/heads/' )
@@ -65,13 +65,13 @@ jobs:
       - name: Rebuild docs for tag
         if: env.TAG != 'devel'
         run: |
-          yarn typedoc --includeVersion --out gh-pages/${TAG}
+          ./node_modules/.bin/typedoc --includeVersion --out gh-pages/${TAG}
           node -p 'var all=fs.readdirSync("gh-pages",{withFileTypes:true}).flatMap(f=>f.isDirectory()&&!isNaN(f.name.charAt(0))?[f.name]:[]).sort(require("semver").rcompare);JSON.stringify({all,stable:all.filter(s=>!s.includes("-"))})' > gh-pages/_data/versions.json
 
       - name: Rebuild docs for devel
         if: env.TAG == 'devel'
         run: |
-          yarn typedoc --out gh-pages/${TAG}
+          ./node_modules/.bin/typedoc --out gh-pages/${TAG}
 
       - name: Commit to gh-pages
         uses: EndBug/add-and-commit@v4

.github/workflows/tests.yml

@@ -22,8 +22,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - run: yarn
-      - run: yarn test
+      - run: npm install
+      - run: npm test
         env:
           TEST_ARANGODB_URL: http://arangodb:8529
           CI: true

.github/workflows/web.yml

@@ -21,5 +21,5 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - run: yarn
+      - run: npm install
       - run: node smoke-test.js

package.json

@@ -50,13 +50,13 @@
     "arango-test": "mocha --reporter json --require source-map-support/register --timeout 30000 build/test",
     "jenkins": "mocha --reporter spec --require source-map-support/register --timeout 0 build/test",
     "test": "mocha --reporter spec --require source-map-support/register --timeout 10000 build/test",
-    "pretest": "yarn build",
+    "pretest": "npm run build",
     "build:package": "cat package.json | jq 'delpaths([[\"private\"],[\"scripts\"],[\"devDependencies\"],[\"babel\"],[\"browserslist\"]])' | sed 's/build\\///g' | sed -r 's/src\\/([^\"]+)\\.ts/\\1.js/g' > build/package.json",
     "build:cjs": "tsc -p . --outDir ./build/ --target es2018 --declarationMap true",
     "build:text": "cp *.md build/",
     "build:web": "webpack",
     "build": "rm -rf build && mkdir build && npm-run-all --parallel build:*",
-    "prepare": "yarn build && node -e 'require(\".\");'"
+    "prepare": "npm run build && node -e 'require(\".\");'"
   },
   "dependencies": {
     "@types/node": ">=13.13.4",