Prepare Kotlin release as well

Author: simolus3

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## 1.8.0 (unreleased)
+## 1.8.0
 
 - Refactor SDK: `com.powersync:powersync-core` has an identical API, but now depends on 
   `com.powersync:powersync-common` where most logic is implemented.

gradle.properties

@@ -19,7 +19,7 @@ development=true
 RELEASE_SIGNING_ENABLED=true
 # Library config
 GROUP=com.powersync
-LIBRARY_VERSION=1.7.0
+LIBRARY_VERSION=1.8.0
 GITHUB_REPO=https://github.com/powersync-ja/powersync-kotlin.git
 # POM
 POM_URL=https://github.com/powersync-ja/powersync-kotlin/