[WIP] Migrate to AndroidX (#141)

Migrate to AndroidX

build.gradle

@@ -1,13 +1,21 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+    ext {
+        kotlin_version = '1.3.0'
+        glide_version = '4.8.0'
+        gpuimage_version = '2.0.3'
+    }
+
     repositories {
-        jcenter()
         google()
+        jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.1'
-        classpath 'com.novoda:bintray-release:0.8.1'
+        classpath 'com.android.tools.build:gradle:3.4.0-alpha03'
+        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
 
@@ -15,6 +23,5 @@ allprojects {
     repositories {
         google()
         jcenter()
-        mavenCentral()
     }
 }