Included node 16 in pipeline

Author: s1hofmann

Diff for: .github/workflows/ci.yaml

@@ -50,7 +50,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest, macos-latest ]
-        node: [ 10, 12, 14, 15 ]
+        node: [ 10, 12, 14, 16 ]
         exclude:
           - os: ubuntu-latest
             node: 14

Diff for: .github/workflows/snapshot_release.yaml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest, macos-latest ]
-        node: [ 10, 12, 14, 15 ]
+        node: [ 10, 12, 14, 16 ]
     runs-on: ${{matrix.os}}
     steps:
       - name: Set up Git repository

Diff for: .github/workflows/tagged_release.yaml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest, macos-latest ]
-        node: [ 10, 12, 14, 15 ]
+        node: [ 10, 12, 14, 16 ]
     runs-on: ${{matrix.os}}
     steps:
       - name: Set up Git repository