Enhanced the report issue link derivation to care about the package.json

bugs field, according to the NPM package specification. The respository
default issue url is used as fallback.

Author: maralv

lib/package-detail-view.js

@@ -50,9 +50,9 @@ export default class PackageDetailView {
 
     const issueButtonClickHandler = (event) => {
       event.preventDefault()
-      const repoUrl = this.packageManager.getRepositoryUrl(this.pack)
-      if (repoUrl) {
-        shell.openExternal(`${repoUrl}/issues/new`)
+      let bugUri = this.packageManager.getRepositoryBugUri(this.pack)
+      if (bugUri) {
+        shell.openExternal(bugUri)
       }
     }
     this.refs.issueButton.addEventListener('click', issueButtonClickHandler)

lib/package-manager.coffee

@@ -402,6 +402,16 @@ class PackageManager
       repoUrl = "https://github.com/#{repoName}"
     repoUrl.replace(/\.git$/, '').replace(/\/+$/, '').replace(/^git\+/, '')
 
+  getRepositoryBugUri: ({metadata}) ->
+    {bugs} = metadata
+    if typeof bugs is 'string'
+      bugUri = bugs
+    else
+      bugUri = bugs?.url ? bugs?.email ? this.getRepositoryUrl({metadata}) + '/issues/new'
+      if bugUri.includes('@')
+        bugUri = 'mailto:' + bugUri
+    bugUri
+
   checkNativeBuildTools: ->
     new Promise (resolve, reject) =>
       apmProcess = @runCommand ['install', '--check'], (code, stdout, stderr) ->