Update Node for tests to 16

Author: markerikson

.github/workflows/test-codegen.yml

@@ -31,7 +31,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x]
+        node-version: ['16.x']
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/tests.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: ['14.x']
+        node: ['16.x']
 
     steps:
       - name: Checkout repo
@@ -58,7 +58,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: ['14.x']
+        node: ['16.x']
     steps:
       - name: Checkout repo
         uses: actions/checkout@v2
@@ -95,7 +95,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: ['14.x']
+        node: ['16.x']
         ts: ['4.1', '4.2', '4.3', '4.4', '4.5', '4.6', '4.7']
     steps:
       - name: Checkout repo