chore: Upgrade to pnpm 8

Author: aklinker1

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup PNPM
         uses: pnpm/action-setup@v2
         with:
-          version: 7
+          version: 8
 
       - name: Setup NodeJS
         uses: actions/setup-node@v3

.github/workflows/validate.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Setup PNPM
         uses: pnpm/action-setup@v2
         with:
-          version: 7
+          version: 8
 
       - name: Setup NodeJS
         uses: actions/setup-node@v3

package.json

@@ -4,7 +4,8 @@
   "version": "0.1.2",
   "description": "Next gen framework for developing web extensions",
   "engines": {
-    "node": ">=18.16.0"
+    "node": ">=18.16.0",
+    "pnpm": ">=8"
   },
   "repository": {
     "type": "git",