Bump kotlin_version from 1.3.70 to 1.3.71 (#26)

Bumps `kotlin_version` from 1.3.70 to 1.3.71.

Updates `kotlin-gradle-plugin` from 1.3.70 to 1.3.71

Updates `kotlin-stdlib` from 1.3.70 to 1.3.71
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v1.3.71/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.3.70...v1.3.71)

Updates `kotlin-test-junit` from 1.3.70 to 1.3.71
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v1.3.71/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.3.70...v1.3.71)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

build.gradle

@@ -1,7 +1,7 @@
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.3.70'
+    ext.kotlin_version = '1.3.71'
 
     repositories {
         mavenCentral()