ci: use major versions of github actions (#30)

Author: Fdawgs

.github/workflows/ci.yml

@@ -22,9 +22,9 @@ jobs:
           - ubuntu-latest
           - windows-latest
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v2
       - name: Use Node.js
-        uses: actions/setup-node@v2.5.1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - name: Install Dependencies