chore: bump to Node 18 (#28)

Author: rzhao271

build/pipeline.yml

@@ -34,17 +34,17 @@ extends:
         testPlatforms:
           - name: Linux
             nodeVersions:
-              - 16.x
+              - 18.x
           - name: MacOS
             nodeVersions:
-              - 16.x
+              - 18.x
           - name: Windows
             nodeVersions:
-              - 16.x   
+              - 18.x
 
         testSteps:
           - script: npm ci
-            displayName: Install dependencies        
+            displayName: Install dependencies
           - script: npm test
             displayName: Test npm package