sdk/ruby: increment version to 2.2

Closes #4586

Author: Dominic Dagradi <ddagradi@gmail.com>
Date: Wed Aug 8 12:39:04 2018 -0700
upstream:819bf6b6d7f09bccfdaa6523eccf453083ff3ced

sdk/ruby: increment version to 2.2.rc.2

Closes #4435

Author: Dominic Dagradi <ddagradi@gmail.com>
Date: Tue Jul 31 11:15:38 2018 -0700
upstream:d4254b6a0082615f28f5ee755faaed222b04ca48

sdk/ruby: increment version to 2.2.rc.1

Closes #4126

Author: Dominic Dagradi <ddagradi@gmail.com>
Date: Fri Jul 13 15:37:03 2018 -0700
upstream:f79adb56520f9fb2a5664111a9b3a2f54980fa42

sdk/ruby: increment version to 2.1

Closes #3725

Author: Dan Croak <dan@statusok.com>
Date: Wed May 16 11:37:17 2018 -0700
upstream:1e66c2a77732db8afaa67eefdbecf70eee7e352d

sdk/ruby: increment version to 2

Closes #3395

Author: Dan Croak <dan@statusok.com>
Date: Wed Apr 18 15:57:29 2018 -0700
upstream:0f28aafb96036c7641d1f67e5447fe45b3131729

sdk/ruby: increment version to 2.rc.2

Import 1.5.2 CHANGELOG.

Closes #3352

Author: Dan Croak <dan@statusok.com>
Date: Mon Apr 16 13:41:20 2018 -0700
upstream:48231b8ad73414a58784fd6915f70794797cdf49

sdk/ruby: increment version to 1.5.2

Closes #3351

Author: Dan Croak <dan@statusok.com>
Date: Mon Apr 16 13:32:32 2018 -0700
upstream:ebffdc6e27f8b295c60a10a810f8d8948a47396b

sdk/ruby: increment version to 2-rc.1

Closes #3267

Author: Dominic Dagradi <ddagradi@gmail.com>
Date: Wed Apr 11 12:15:39 2018 -0700
upstream:e52f7ec283303d30fb5b738fb05c4745bfd78bef

sdk/ruby: increment version to 1.5.1

Closes #3263

Author: Chris Garvin <chris.garvin@me.com>
Date: Wed Apr 11 10:24:00 2018 -0700
upstream:0f9a8048c2933b1bba765818ebfff1dcdc014842

sdk/ruby: increment version to 1.5

Closes #2833

Author: Dan Croak <dan@statusok.com>
Date: Fri Mar 16 10:47:38 2018 -0700
upstream:a144e7b98be9c34f21b991056e30f42e1bd66f7f