Add tests and detect WhatsApp Web updates (#686)

* test setup, add initializer tests

* test sending messages

* add script to check latest version

* add github action

* use env vars

* configure environment with .env file

* add test for sticker name and author

* add DownloadManager model

* test chats and contacts

* test for number utility functions

* throw error if no remote id has been set

* Update .version

.github/workflows/update.yml

@@ -0,0 +1,35 @@
+name: Update
+
+on:
+  schedule:
+    - cron: "0/15 * * * *"
+  workflow_dispatch:
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install node v14
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+      - name: Install dependencies
+        run: npm install
+      - run: cd ./tools/version-checker
+      - name: Run Updater
+        run: ./update-version
+      - name: Store WA Version
+        run: echo WA_VERSION=`cat ./.version` >> $GITHUB_ENV
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v3
+        with:
+          commit-message: Update supported WhatsApp Web version to v${{ env.WA_VERSION }}
+          title: Update WhatsApp Web Version (${{ env.WA_VERSION }})
+          body: |
+            A new version of WhatsApp Web has been detected! 
+            
+            Tests should be run against this new version before merging.
+          labels: WhatsApp Change
+          reviewers: pedroslopez