Merge tag 'ios-maven-plugin-1.3.8' into develop

Create tag 1.3.8
Update version to 1.3.9-SNAPSHOT
Make the artifact be just the .ipa file and have the dSYM folder packaged
into a zip file
Change how artifacts are generated.

The ipa and dSYM files are now generated only during ‘package’ build
phase. That is ‘package’ now runs the xcrun command and zip the dSYM
package.
Refactored build properties so that they are shared across goals
Code cleanup
Bypass the ‘skipPodsUpdate’ parameter if the project requires pods
but they aren’t installed
Fix potential bug when assembling that appDir path which was always
using the default sdk component.
Make sourceDir default to “” if null
Update version to 1.4.0
Merge branch 'release/1.4.0'