BREAKING CHANGE: update to use nodeJS v16

Since it's used in Github environment it should not have any impact in usage.
Just in case major version updated.

Fixes #82

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        node-version: [14.x]
+        node-version: [16.x]
 
     steps:
       - name: Checkout

.github/workflows/manual-release.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        node-version: [ 14.x ]
+        node-version: [ 16.x ]
     steps:
       - name: Checkout
         uses: actions/checkout@v2

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        node-version: [ 14.x ]
+        node-version: [ 16.x ]
 
     steps:
       - name: Checkout