bump version to 1.1.0 (#15)

Author: ericgribkoff

pom.xml

@@ -19,7 +19,7 @@
 
  <groupId>io.grpc</groupId>
  <artifactId>grpc-java-api-checker</artifactId>
- <version>1.1.0-SNAPSHOT</version>
+ <version>1.1.0</version>
 
  <name>grpc-java-api-checker</name>
  <description>An Error Prone plugin that checks for usages of grpc-java experimental or internal APIs.</description>