Relax Guava version dependency

Change-Id: Ia395c89a7cf865a0ae287904244d5991e482be7c
diff --git a/pom.xml b/pom.xml
index d38062e..8f8fc89 100644
--- a/pom.xml
+++ b/pom.xml
@@ -55,6 +55,16 @@
                 <artifactId>maven-bundle-plugin</artifactId>
                 <version>3.0.1</version>
                 <extensions>true</extensions>
+                <configuration>
+                    <niceManifest>true</niceManifest>
+                    <instructions>
+                      <!-- Any Guava version 19.0 or later-->
+                      <Import-Package>
+                          com.google.*;version=19.0,
+                          *
+                      </Import-Package>
+                    </instructions>
+                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>