build(deps): bump kotlin_version from 1.6.21 to 1.7.0

Bumps `kotlin_version` from 1.6.21 to 1.7.0.

Updates `kotlin-gradle-plugin` from 1.6.21 to 1.7.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.6.21...v1.7.0)

Updates `kotlin-android-extensions` from 1.6.21 to 1.7.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.6.21...v1.7.0)

Updates `kotlin-stdlib-jdk8` from 1.6.21 to 1.7.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.6.21...v1.7.0)

---
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-android-extensions
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib-jdk8
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle

@@ -10,7 +10,7 @@ buildscript {
         appcompatVersion = "1.3.1"
         androidxTestJunitVersion = "1.1.3"
         sqliteVersion = "2.2.0"
-        kotlin_version = '1.6.21'
+        kotlin_version = '1.7.0'
         version_dokka = "1.6.20"
     }