MARKETING_VERSION support for Xcode 11

[wowo-apps]

When using Xcode 11 or newer on Bitrise, can't parse CFBundleShortVersionString, because Xcode using $(MARKETING_VERSION) from Build Settings.

$(MARKETING_VERSION) should be updated instead of CFBundleShortVersionString in Info.plist for Xcode 11 or newer.

+------------------------------------------------------------------------------+
| id: set-ios-version                                                          |
| version: 2.0.0                                                               |
| collection: https://github.com/bitrise-io/bitrise-steplib.git                |
| toolkit: bash                                                                |
| time: 2019-10-11T15:50:03Z                                                   |
+------------------------------------------------------------------------------+
|                                                                              |
 [!] No Bundle Short Version String (bundle_version_short) specified!
 (i) Provided Info.plist file path: (...)/Info.plist
 (i) Provided Bundle Version: 30
 (i) Provided Bundle Short Version String: 
 (i) Provided append version: false


 (i) Replacing version...
 (i) Original Bundle Version: 1
 (i) Original Bundle Short Version String: $(MARKETING_VERSION)
 (i) Replaced Bundle Version: 30
 (i) Replaced Bundle Short Version String: $(MARKETING_VERSION)
|                                                                              |
+---+---------------------------------------------------------------+----------+

[wowo-apps]

MARKETING_VERSION has separate values in Build Settings for Debug and Release