chore(developer): add developer-utils as workspace

Author: mcdurdin

package-lock.json

@@ -23,6 +23,7 @@
     "resources/build/version",
     "core/include/ldml",
     "developer/src/common/web/test-helpers",
+    "developer/src/common/web/utils",
     "developer/src/kmc-analyze",
     "developer/src/kmc-keyboard-info",
     "developer/src/kmc-kmn",