fix: main/pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEGUAVA-1015415

main/pom.xml

@@ -37,7 +37,7 @@
 		<kdewallet.version>1.1.1</kdewallet.version>
 		<jwt.version>3.10.3</jwt.version>
 		<easybind.version>2.1.0</easybind.version>
-		<guava.version>29.0-jre</guava.version>
+		<guava.version>30.0-android</guava.version>
 		<dagger.version>2.22</dagger.version>
 		<gson.version>2.8.6</gson.version>
 		<slf4j.version>1.7.30</slf4j.version>