Bump com.guardsquare:proguard-gradle from 7.4.2 to 7.5.0

Bumps [com.guardsquare:proguard-gradle](https://github.com/Guardsquare/proguard) from 7.4.2 to 7.5.0.
- [Release notes](https://github.com/Guardsquare/proguard/releases)
- [Commits](Guardsquare/proguard@v7.4.2...v7.5)

---
updated-dependencies:
- dependency-name: com.guardsquare:proguard-gradle
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle

@@ -15,7 +15,7 @@ buildscript {
     dependencies {
         classpath 'gradle.plugin.com.github.johnrengelman:shadow:7.1.2'
         classpath 'org.apache.commons:commons-configuration2:2.9.0'
-        classpath 'com.guardsquare:proguard-gradle:7.4.2'
+        classpath 'com.guardsquare:proguard-gradle:7.5.0'
         classpath 'com.github.spotbugs.snom:spotbugs-gradle-plugin:5.2.5'
         classpath 'org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:3.5.0.2730'
     }