Merge pull request #6295 from atom/ks-require-package-dot-json

Use require to read/parse package.json

src/package-manager.coffee

@@ -276,8 +276,7 @@ class PackageManager
   getPackageDependencies: ->
     unless @packageDependencies?
       try
-        metadataPath = path.join(@resourcePath, 'package.json')
-        {@packageDependencies} = JSON.parse(fs.readFileSync(metadataPath)) ? {}
+        @packageDependencies = require('../package.json')?.packageDependencies
       @packageDependencies ?= {}
 
     @packageDependencies