Merge pull request #81 from ballerina-platform/automated/dependency_version_update

[AUTO MERGE] Update Dependencies (Ballerina Lang : 2.0.0-beta.1-20210504-134400-67794dfe)

Author: ballerina-bot

gradle.properties

@@ -1,4 +1,4 @@
 org.gradle.caching=true
 group=org.ballerinalang
 version=0.7.0-beta.1-SNAPSHOT
-ballerinaLangVersion=2.0.0-beta.1-20210503-234400-f5ab2412
+ballerinaLangVersion=2.0.0-beta.1-20210504-134400-67794dfe