default to development mode

following jupyterlab/extension-cookiecutter-ts#98

Author: ianhi

{{cookiecutter.github_project_name}}/package.json

@@ -29,7 +29,8 @@
     "url": "https://github.com/{{ cookiecutter.github_organization_name }}/{{ cookiecutter.github_project_name }}"
   },
   "scripts": {
-    "build": "npm run build:lib && npm run build:nbextension && npm run build:labextension",
+    "build": "npm run build:lib && npm run build:nbextension && npm run build:labextension:dev",
+    "build:prod": "npm run build:lib && npm run build:nbextension && npm run build:labextension",
     "build:labextension": "jupyter labextension build .",
     "build:labextension:dev": "jupyter labextension build --development True .",
     "build:lib": "tsc",

{{cookiecutter.github_project_name}}/setup.py

@@ -60,7 +60,7 @@
 cmdclass = create_cmdclass('jsdeps', package_data_spec=package_data_spec,
     data_files_spec=data_files_spec)
 cmdclass['jsdeps'] = combine_commands(
-    install_npm(HERE, build_cmd='build'),
+    install_npm(HERE, build_cmd='build:prod'),
     ensure_targets(jstargets),
 )