Cannot compile with proguard

[Nicolas Agustin Rodriguez]

Since #36 It throws an error compiling:

Warning:Exception while processing task java.io.IOException: proguard.ParseException: Unknown option 'com.squareup.okhttp' in line 3 of file '/Users/user/.gradle/caches/transforms-1/files-1.1/picasso-transformations-2.2.0.aar/16c5d97f0c603c4db20540986cd71722/proguard.txt'

In picasso-transformations/transformations/proguard-rules.txt it says:
-dontwarn dontwarn com.squareup.okhttp
I think it should be:
-dontwarn com.squareup.okhttp

[Daichi Furiya]

@nrodriguez-tupaca

Thanks.

#37

[Daichi Furiya]

I just released the new version to 2.2.1.