feat: Add support for node 14 and 15 (#14)

Author: eps1lon

.github/workflows/ci.yml

@@ -12,6 +12,9 @@ on:
 jobs:
   test:
     runs-on: windows-latest
+    strategy:
+      matrix:
+        node: [12, 14, 15]
     env:
       SRTL_DEV: true
 
@@ -20,7 +23,7 @@ jobs:
       - name: Use node@12
         uses: actions/setup-node@v1
         with:
-          node-version: "12.x"
+          node-version: ${{ matrix.node }}
       - uses: microsoft/playwright-github-action@v1
       - run: yarn
       - name: "Lockfile changes from running `yarn` committed?"

src/package.json

@@ -13,7 +13,7 @@
 		"proper-lockfile": "^4.1.1"
 	},
 	"engines": {
-		"node": "^12.18.4"
+		"node": "^12.18.4 || ^14.0.0 || ^15.0.0"
 	},
 	"scripts": {
 		"install": "node install"