update ci workflow node environments to 18 and 20

Author: SourceR85

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ on:
     branches: [master]
 
 env:
-  NODE_VERSION: 14
+  NODE_VERSION: 20
   TEST_HOST: localhost
 
 permissions:
@@ -56,7 +56,7 @@ jobs:
       fail-fast: false
       matrix:
         couchdb: ['2.3', '3.1']
-        node: [14, 16]
+        node: [18, 20]
         cmd:
           - npm test
           - TYPE=find PLUGINS=pouchdb-find ADAPTERS=http npm test
@@ -145,7 +145,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [14, 16]
+        node: [18, 20]
         adapter: ['leveldb', 'memory']
         cmd:
           - npm test
@@ -224,7 +224,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [14, 16]
+        node: [18, 20]
         cmd:
           - CLIENT=firefox npm run test-webpack
           - AUTO_COMPACTION=true npm test