Merge pull request #53 from pwittchen/dependabot/gradle/io.reactivex.…

…rxjava2-rxjava-2.2.13

Bump rxjava from 2.2.12 to 2.2.13

build.gradle

@@ -7,7 +7,7 @@ ext {
   kotlinVersion = '1.3.50'
 }
 
-ext.deps = [rxjava2           : 'io.reactivex.rxjava2:rxjava:2.2.12',
+ext.deps = [rxjava2           : 'io.reactivex.rxjava2:rxjava:2.2.13',
             rxandroid2        : 'io.reactivex.rxjava2:rxandroid:2.1.1',
             supportannotations: 'com.android.support:support-annotations:28.0.0',
             appcompatv7       : 'com.android.support:appcompat-v7:28.0.0',