Support PyCharm in launchEditor (facebook#2740)

PyCharm has the same signature as WebStorm and PhpStorm `<editor> <projectPath> --line <number> <filePath>` so it can reuse the logic from those.

https://www.jetbrains.com/help/pycharm/opening-files-from-command-line.html

Tested with PyCharm Pro 2017.1.4 on MacOS 10.12

Author: danrr

packages/react-dev-utils/launchEditor.js

@@ -91,6 +91,8 @@ function getArgumentsForLineNumber(editor, fileName, lineNumber, workspace) {
     case 'webstorm64':
     case 'phpstorm':
     case 'phpstorm64':
+    case 'pycharm':
+    case 'pycharm64':
       return addWorkspaceToArgumentsIfExists(
         ['--line', lineNumber, fileName],
         workspace