Merge pull request #76 from ballerina-platform/automated/dependency_version_update

[AUTO MERGE] Update Dependencies (Ballerina Lang : 2.0.0-alpha9-20210501-094100-02a84fd6)

Author: ballerina-bot

gradle.properties

@@ -1,4 +1,4 @@
 org.gradle.caching=true
 group=org.ballerinalang
 version=0.7.0-alpha9-SNAPSHOT
-ballerinaLangVersion=2.0.0-alpha9-20210429-232900-7e5ce4cf
+ballerinaLangVersion=2.0.0-alpha9-20210501-094100-02a84fd6