chore: Add node v12 support (twilio#200)

Author: Anuj Badhwar

.github/workflows/cli-core-audit.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [16.x, 14.x]
+        node-version: [16.x, 14.x, 12.x, 10.x]
     steps:
       - name: Checkout cli repo
         uses: actions/checkout@v2

.github/workflows/cli-core-test.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [16.x, 14.x, 10.x]
+        node-version: [16.x, 14.x, 12.x, 10.x]
     steps:
       - name: Checkout cli core repo
         uses: actions/checkout@v2

.github/workflows/release.yml

@@ -87,7 +87,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [10.x,14.x]
+        node-version: [10.x, 12.x, 14.x, 16.x]
     steps:
       - name: Checkout cli-core repo
         uses: actions/checkout@v2