feat: make @testing-library/dom a peer dependency (#304)

BREAKING CHANGE: Requires @testing-library/dom@^8.0.0 || ^9.0.0

.github/workflows/validate.yml

@@ -24,6 +24,12 @@ jobs:
       matrix:
         eslint: [6.8.0, 6, 7.0.0, 7, 8.0.0, 8]
         node: [12.22.0, 12, 14.17.0, 14, 16.0.0, 16]
+        testing-library-dom: [8, 9]
+        exclude:
+          - node: 12.22.0
+            testing-library-dom: 9
+          - node: 12
+            testing-library-dom: 9
     runs-on: ubuntu-latest
     steps:
       - name: ⬇️ Checkout repo
@@ -42,6 +48,9 @@ jobs:
       - name: Install ESLint v${{ matrix.eslint }}
         run: npm install --no-save --force eslint@${{ matrix.eslint }}
 
+      - name: Install @testing-library/dom v${{ matrix.testing-library-dom }}
+        run: npm install --no-save --force @testing-library/dom@${{ matrix.testing-library-dom }}
+
       - name: ▶️ Run validate script (without linting)
         if: ${{ matrix.eslint != 8 }}
         run: npm run validate -- build,test:coverage

package.json

@@ -42,7 +42,6 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.16.3",
-    "@testing-library/dom": "^8.11.1",
     "requireindex": "^1.2.0"
   },
   "devDependencies": {
@@ -55,7 +54,8 @@
     "typescript": "^4.5.3"
   },
   "peerDependencies": {
-    "eslint": "^6.8.0 || ^7.0.0 || ^8.0.0"
+    "eslint": "^6.8.0 || ^7.0.0 || ^8.0.0",
+    "@testing-library/dom": "^8.0.0 || ^9.0.0"
   },
   "eslintConfig": {
     "extends": "./node_modules/kcd-scripts/eslint.js",