Add CI

Author: NullVoxPopuli

.github/workflows/ci-build.yml

@@ -36,6 +36,31 @@ jobs:
       - run: yarn install --no-lockfile
       - run: yarn test:ember
 
+  types-scenarios:
+    name: "Types: ${{ matrix.tsVersion }}"
+    runs-on: ubuntu-latest
+    needs: test
+
+    strategy:
+      matrix:
+        tsVersion:
+          - 4.4
+          - 4.6
+          - 4.8
+          - 5.0
+          - 5.1
+    steps:
+      - uses: actions/checkout@v2
+      - uses: volta-cli/action@v1
+      - name: install dependencies
+        run: yarn install --frozen-lockfile
+      - name: Swap TS Version
+        run: yarn add --dev typescript@{{ matrix.tsVersion }}
+      - name: Check Types
+        run: |
+          tsc -v
+          yarn test:types
+
   try-scenarios:
     name: "Try: ${{ matrix.ember-try-scenario }}"
 
@@ -89,4 +114,4 @@ jobs:
       - name: publish to npm
         run: npm publish
         env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }}