update POM to version 1.2.0-SNAPSHOT

I accidentally left it at 1.1.0 for several commits, which means we were updating the artifacts on Maven Central multiple times. I checked out the 1.1.0 tag and re-deployed it so that should be clean now.

Author: abyrd

pom.xml

@@ -8,7 +8,7 @@
 
     <groupId>org.opentripplanner</groupId>
     <artifactId>otp</artifactId>
-    <version>1.1.0</version>
+    <version>1.2.0-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <licenses>