chore: update to pnpm 7 (#51)

Author: lukashass

.github/workflows/formatting-types.yml

@@ -33,7 +33,7 @@ jobs:
 
       - uses: pnpm/action-setup@v2.0.1
         with:
-          version: 6
+          version: 7
           run_install: true
 
       - name: Check formatting

.github/workflows/release.yml

@@ -31,7 +31,7 @@ jobs:
 
       - uses: pnpm/action-setup@v2.0.1
         with:
-          version: 6
+          version: 7
           run_install: true
 
       - name: Format

.github/workflows/test.yml

@@ -39,7 +39,7 @@ jobs:
 
       - uses: pnpm/action-setup@v2.0.1
         with:
-          version: 6
+          version: 7
           run_install: true
 
       - name: Install eslint@${{ matrix.eslint-version }}

package.json

@@ -47,5 +47,8 @@
   },
   "peerDependencies": {
     "eslint": "^7.0.0 || ^8.0.0"
+  },
+  "engines": {
+    "pnpm": "7"
   }
 }