update npm release process

when publishing, do not use "prepare" script to re-build the dist files, just use the files that are there from earlier in release.sh

package.json

@@ -82,7 +82,6 @@
     "build": "rollup -c profiles/debug.js & rollup -c profiles/production.js",
     "lint": "semistandard | snazzy",
     "prebuild": "mkdirp dist",
-    "prepare": "npm run build",
     "pretest": "npm run build",
     "precommit": "npm run lint",
     "fix": "semistandard --fix",

scripts/release.sh

@@ -29,10 +29,10 @@ zip -r $NAME-v$VERSION.zip dist
 # run gh-release to create the tag and push release to github
 gh-release --assets $NAME-v$VERSION.zip
 
+# publish release on NPM
+npm publish
+
 # checkout master and delete release branch locally and on GitHub
 git checkout master
 git branch -D gh-release
 git push https://github.com/Esri/esri-leaflet :gh-release
-
-# publish release on NPM
-npm publish