use gitexec package for managing git child processes

Author: rvagg

branch-diff.js

@@ -13,7 +13,7 @@ const fs             = require('fs')
     , commitToOutput = require('changelog-maker/commit-to-output')
     , collectCommitLabels = require('changelog-maker/collect-commit-labels')
     , groupCommits   = require('changelog-maker/group-commits')
-    , gitexec        = require('./gitexec')
+    , gitexec        = require('gitexec')
 
     , pkgFile        = path.join(process.cwd(), 'package.json')
     , pkgData        = fs.existsSync(pkgFile) ? require(pkgFile) : {}
@@ -151,4 +151,4 @@ if (require.main === module) {
 
     printCommits(list, simple)
   })
-}
+}

gitexec.js

@@ -14,6 +14,7 @@
     "changelog-maker": "~1.8.2",
     "commit-stream": "~1.0.1",
     "deep-equal": "~1.0.0",
+    "gitexec": "~1.0.0",
     "list-stream": "~1.0.0",
     "map-async": "~0.1.1",
     "minimist": "~1.1.1",