Bump core-ktx from 1.7.0 to 1.8.0

Bumps core-ktx from 1.7.0 to 1.8.0.

---
updated-dependencies:
- dependency-name: androidx.core:core-ktx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle

@@ -22,7 +22,7 @@ buildscript {
     ext.rxbinding = 'com.jakewharton.rxbinding2:rxbinding:2.2.0'
     ext.rxbindingKotlin = 'com.jakewharton.rxbinding2:rxbinding-kotlin:2.2.0'
 
-    ext.androidCore = 'androidx.core:core-ktx:1.7.0'
+    ext.androidCore = 'androidx.core:core-ktx:1.8.0'
     ext.appCompat = 'androidx.appcompat:appcompat:1.4.1'
     ext.material = 'com.google.android.material:material:1.6.0-beta01'