Bump kotlin_version from 1.3.50 to 1.6.0

Bumps `kotlin_version` from 1.3.50 to 1.6.0.

Updates `kotlin-gradle-plugin` from 1.3.50 to 1.6.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

Updates `kotlin-stdlib-jdk7` from 1.3.50 to 1.6.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib-jdk7
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle

@@ -1,7 +1,7 @@
 
 buildscript {
     apply from: 'dependencies.gradle'
-    ext.kotlin_version = '1.3.50'
+    ext.kotlin_version = '1.6.0'
     ext.jacoco_version = '0.8.2'
 
     repositories {

dependencies.gradle

@@ -3,7 +3,7 @@ ext {
     targetSDK = 29
     compileSDK = 29
 
-    kotlin_version = "1.3.50"
+    kotlin_version = "1.6.0"
     androidx_compat_version = "1.4.0"
     androidx_core_version = "1.1.0"
     androidx_constraintlayout_version = "1.1.3"