Release 1.2.0 (#232) (#235)

* FIX: Github Marketplace action not picking up the latest release automatically [#189]
* FIX: Calling variants setup on M1 mac uses M1 unsupported gems in Gemfile [#208]
* FIX: Variants setup on M1 mac does not automatically link variants.xcconfig to xcodeproject [#209]
* FIX: Some signing configurations not automatically set in Xcode 14 [#214]

* REFACTOR: Signing configuration is updated not only during `setup` but also during `switch` [#215]
* REFACTOR: Items in `variants.xcconfig` should be sorted alphabetically [#219]

* FEATURE: Ability to add a `postSwitch` command/script, both globally or variant specific [#221]
* FEATURE:  Add ability to override app name per variant [#216]
* FEATURE: Expose configuration keys as static variables in swift [#125]
 
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