Update gradle and fix error compilation

Author: FrangSierra

app/build.gradle

@@ -8,7 +8,7 @@ buildscript {
         firebase_firestore_version='17.1.3'
         firebase_functions_version='16.1.3'
         firebase_remote_version='16.1.0'
-        support_version = "27.0.2"
+        support_version = "28.0.3"
     }
 }
 apply plugin: 'com.android.library'
@@ -22,7 +22,7 @@ android {
     }
 
     compileSdkVersion 28
-    buildToolsVersion "27.0.3"
+    buildToolsVersion "28.0.3"
 
     defaultConfig {
         minSdkVersion 14

build.gradle

@@ -2,11 +2,11 @@
 
 buildscript {
     repositories {
-        jcenter()
         google()
+        jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath 'com.android.tools.build:gradle:3.2.1'
         classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Thu Jul 12 10:29:40 CEST 2018
+#Fri Nov 30 11:51:14 CET 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip