fix: clean exit on postinstall dependency missing #25

Author: xidedix

package.json

@@ -63,7 +63,7 @@
     "js-compile-utilities": "rollup --environment BUNDLE:false --config build/rollup.config.utilities.js --sourcemap",
     "js-minify": "uglifyjs --compress typeofs=false --mangle --comments \"/^!/\" --source-map \"content=dist/js/coreui.js.map,includeSources,url=coreui.min.js.map\" --output dist/js/coreui.min.js dist/js/coreui.js",
     "js-minify-utilities": "uglifyjs --compress typeofs=false --mangle --comments \"/^!/\" --source-map \"content=dist/js/coreui-utilities.js.map,includeSources,url=coreui-utilities.min.js.map\" --output dist/js/coreui-utilities.min.js dist/js/coreui-utilities.js",
-    "postinstall": "coreui-plugin-npm-postinstall",
+    "postinstall": "coreui-plugin-npm-postinstall || exit 0",
     "release-version": "node build/change-version.js",
     "release-zip": "cd dist/ && zip -r9 coreui-$npm_package_version-dist.zip * && shx mv coreui-$npm_package_version-dist.zip ..",
     "watch": "npm-run-all --parallel watch-css watch-js",