Use jdk8 version of Kotlin dep, resolves #1764

color/build.gradle

@@ -27,7 +27,7 @@ android {
 
 dependencies {
   implementation 'androidx.recyclerview:recyclerview:' + versions.androidxRecyclerView
-  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:' + versions.kotlin
+  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:' + versions.kotlin
 
   implementation 'com.afollestad:viewpagerdots:' + versions.dotsIndicator
 

core/build.gradle

@@ -29,7 +29,7 @@ dependencies {
   api 'androidx.annotation:annotation:' + versions.androidxAnnotation
 
   implementation 'androidx.recyclerview:recyclerview:' + versions.androidxRecyclerView
-  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:' + versions.kotlin
+  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:' + versions.kotlin
 }
 
 apply from: '../spotless.gradle'

datetime/build.gradle

@@ -29,7 +29,7 @@ dependencies {
   api 'androidx.annotation:annotation:' + versions.androidxAnnotation
 
   implementation 'androidx.recyclerview:recyclerview:' + versions.androidxRecyclerView
-  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:' + versions.kotlin
+  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:' + versions.kotlin
 
   implementation 'com.afollestad:viewpagerdots:' + versions.dotsIndicator
 

files/build.gradle

@@ -26,7 +26,7 @@ android {
 
 dependencies {
   implementation 'androidx.recyclerview:recyclerview:' + versions.androidxRecyclerView
-  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:' + versions.kotlin
+  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:' + versions.kotlin
   implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:' + versions.coroutines
 
   implementation project(':core')

input/build.gradle

@@ -26,7 +26,7 @@ android {
 
 dependencies {
   implementation 'com.google.android.material:material:' + versions.androidxMaterial
-  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:' + versions.kotlin
+  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:' + versions.kotlin
   implementation project(':core')
 }
 

lifecycle/build.gradle

@@ -25,7 +25,7 @@ android {
 }
 
 dependencies {
-    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:' + versions.kotlin
+    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:' + versions.kotlin
     implementation project(':core')
 
     implementation 'androidx.lifecycle:lifecycle-runtime:' + versions.lifecycle

sample/build.gradle

@@ -23,7 +23,7 @@ dependencies {
   implementation project(':color')
   implementation project(':datetime')
 
-  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:' + versions.kotlin
+  implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:' + versions.kotlin
 
   implementation 'androidx.appcompat:appcompat:' + versions.androidxCore
   implementation 'androidx.gridlayout:gridlayout:' + versions.androidxRecyclerView