travis ci

fix travis ci

build.gradle

@@ -5,7 +5,9 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath('com.android.tools.build:gradle:2.3.3') {
+            force = true
+        }
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

library/build.gradle

@@ -31,7 +31,4 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:25.3.1'
-
-    compile 'io.reactivex:rxjava:1.1.6'
-    compile 'io.reactivex:rxandroid:1.1.0'
 }