use Node 22 in CI workflows (#354)

Author: RobinMalfait

.github/workflows/nodejs.yml

@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12, 14, 16]
+        node-version: [20, 22]
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/prepare-release.yml

@@ -21,7 +21,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18]
+        node-version: [22]
 
     steps:
       - uses: actions/checkout@v3

.github/workflows/release-insiders.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12]
+        node-version: [22]
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18]
+        node-version: [22]
 
     steps:
       - uses: actions/checkout@v3