ci: clamp node version to match local env

Author: codebender828

.github/workflows/pr.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x]
+        node-version: [12.19]
     steps:
     - name: Checkout
       uses: actions/checkout@v2

.github/workflows/release.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Use Node.js 12.x
       uses: actions/setup-node@master
       with:
-        node-version: 12.x
+        node-version: 12.19
 
     - name: Install dependencies
       run: yarn install --frozen-lockfile && yarn bootstrap