Use pbxproj-dom version that correctly escapes \' (#2431)

Author: PanayotCankov

package.json

@@ -58,7 +58,7 @@
     "mute-stream": "0.0.5",
     "open": "0.0.5",
     "osenv": "0.1.3",
-    "pbxproj-dom": "1.0.7",
+    "pbxproj-dom": "1.0.8",
     "plist": "1.1.0",
     "plist-merge-patch": "0.0.9",
     "plistlib": "0.2.1",