ci: run on node 14 and 16 instead of 12 and 14

Author: jmcdo29

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [14.x, 16.x]
         test:
           [
             complex-sample,
@@ -51,7 +51,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [14.x, 16.x]
     needs: [unit-tests]
     steps:
       - uses: actions/checkout@v1