chore: Do not run tests on node 12

Author: javierbrea

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: ["12.22.1", "14.17.0", "15.14.0", "16.1.0"]
+        node: ["14.17.0", "15.14.0", "16.1.0"]
     steps:
       - name: Checkout
         uses: actions/checkout@v2