Update dependencies.

build.gradle

@@ -6,15 +6,15 @@ buildscript {
             'compile_sdk'         : 28,
             'version_code'        : 1,
             'version_name'        : '0.3.1',
-            'kotlin_lang'         : '1.3.50',
-            'material_library'    : '1.0.0',
-            'androidx_appcompat'  : '1.1.0',
+            'kotlin_lang'         : '1.3.71',
+            'material_library'    : '1.1.0',
+            'androidx_appcompat'  : '1.2.0-beta01',
             'androidx_legacy'     : '1.0.0',
-            'androidx_core_ktx'   : '1.2.0-rc01',
-            'constraint_layout'   : '1.1.3',
+            'androidx_core_ktx'   : '1.3.0-beta01',
+            'constraint_layout'   : '2.0.0-beta4',
             'cardview'            : '1.0.0',
             'recyclerview'        : '1.1.0',
-            'threetenabp'         : '1.1.1',
+            'threetenabp'         : '1.2.3',
             'junit'               : '4.12',
             'espresso'            : '3.1.1',
             'androidx_test_runner': '1.1.1',
@@ -27,7 +27,7 @@ buildscript {
 
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.3'
+        classpath 'com.android.tools.build:gradle:3.6.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$versions.kotlin_lang"
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
     }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sat Aug 31 18:47:38 WAT 2019
+#Sun Apr 05 08:20:22 CEST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip

library/build.gradle

@@ -50,7 +50,7 @@ dependencies {
     api "androidx.recyclerview:recyclerview:$versions.recyclerview"
 
     testImplementation "junit:junit:$versions.junit"
-    testImplementation('org.threeten:threetenbp:1.3.2') {
+    testImplementation('org.threeten:threetenbp:1.3.7') {
         // Use threetenBP library for tests as context will
         // not be available to initialise threetenABP
         exclude group: 'com.jakewharton.threetenabp', module: 'threetenabp'