Dark Sky - Yawb4oH2 (Yet another weather binding for openHAB 2)

HI,
i use OH2.5 M1

Binding do not work

Here is te Log:

2019-06-16 09:49:08.698 [WARN ] [org.apache.felix.fileinstall        ] - Error while starting bundle: file:/usr/share/openhab2/addons/org.openhab.binding.darksky-2.5.0-SNAPSHOT.jar

org.osgi.framework.BundleException: Could not resolve module: org.openhab.binding.darksky [279]

Unresolved requirement: Import-Package: com.google.gson; version=“[2.8.0,3.0.0)”

at org.eclipse.osgi.container.Module.start(Module.java:444) ~[?:?]

at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:383) ~[?:?]

at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle(DirectoryWatcher.java:1260) [10:org.apache.felix.fileinstall:3.6.4]

at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(DirectoryWatcher.java:1233) [10:org.apache.felix.fileinstall:3.6.4]

at org.apache.felix.fileinstall.internal.DirectoryWatcher.doProcess(DirectoryWatcher.java:520) [10:org.apache.felix.fileinstall:3.6.4]

at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:365) [10:org.apache.felix.fileinstall:3.6.4]

at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:316) [10:org.apache.felix.fileinstall:3.6.4]