Bump library versions (#391)

Author: thagikura

build.gradle

@@ -21,12 +21,12 @@ buildscript {
         minSdkVersion = 14
         targetSdkVersion = 27
         compileSdkVersion = 27
-        buildToolsVersion = "27.0.1"
+        buildToolsVersion = "27.0.2"
         androidGradlePluginVersion = "3.0.1"
         androidMavenGradlePluginVersion = "1.5"
         gradleBintrayPluginVersion = "1.6"
         kotlinVersion = "1.1.61"
-        supportLibVersion = "27.0.1"
+        supportLibVersion = "27.0.2"
         espressoVersion = "3.0.0"
         testRunnerVersion = "1.0.0"
         junitVersion = "4.12"