Switch to using Java 8 DateTime instead of Calendar

build.gradle

@@ -11,11 +11,11 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.3'
+        classpath 'com.android.tools.build:gradle:4.2.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${versions.kotlin}"
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
-        classpath 'org.jlleitschuh.gradle:ktlint-gradle:10.0.0'
-        classpath 'com.github.ben-manes:gradle-versions-plugin:0.38.0'
+        classpath 'org.jlleitschuh.gradle:ktlint-gradle:10.2.0'
+        classpath 'com.github.ben-manes:gradle-versions-plugin:0.39.0'
     }
 }
 

core/build.gradle

@@ -10,17 +10,21 @@ android {
     defaultConfig {
         minSdkVersion buildConfig.minSdk
         targetSdkVersion buildConfig.targetSdk
+        multiDexEnabled true
     }
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
+        coreLibraryDesugaringEnabled true
     }
     testOptions {
         unitTests.includeAndroidResources = true
     }
 }
 
 dependencies {
+    coreLibraryDesugaring libraries.coreLibraryDesugaring
+
     implementation project(':base')
     implementation libraries.kotlin