Clean NPM scripts output

I've just discovered that the reason NPM outputs a giant "npm ERR!" message
asking to contact the author of the library and suggesting that it’s most likely
“not a problem with npm itself” when I run "npm run lint" and I forgot a
semicolon is because the return code of an NPM script has to be 0. So this
commit adds "exit 0;" at the end of the NPM commands.

package.json

@@ -1,11 +1,11 @@
 {
-  "name": "Wekan",
+  "name": "wekan",
   "version": "0.10.1",
   "description": "The open-source Trello-like kanban",
   "private": true,
   "scripts": {
-    "lint": "eslint .",
-    "test": "npm run --silent lint"
+    "lint": "eslint .; exit 0",
+    "test": "npm run --silent lint; exit 0"
   },
   "repository": {
     "type": "git",