Properly initialize linter and properly call analyzer in CI

.github/workflows/qa.yml

@@ -16,6 +16,21 @@ jobs:
           extensions: mbstring, intl
           tools: phpcs
 
+      - name: Get composer cache directory
+        id: composercache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composercache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: Install composer dependencies
+        run: |
+          composer install
+
       - name: Run PHP Code Sniffer
         run: |
           composer lint
@@ -49,7 +64,7 @@ jobs:
 
       - name: Run phpstan
         run: |
-          composer analyze
+          composer analyse
 
   unit-tests:
     runs-on: ubuntu-20.04