chore(deps): group hamcrest deps and update to 2.2 (#17)

Author: chingor13

google-cloud-storage/pom.xml

@@ -16,6 +16,7 @@
  </parent>
  <properties>
  <site.installationModule>google-cloud-storage</site.installationModule>
+ <hamcrest.version>2.2</hamcrest.version>
  </properties>
  <dependencies>
  <dependency>
@@ -92,13 +93,13 @@
  <dependency>
  <groupId>org.hamcrest</groupId>
  <artifactId>hamcrest</artifactId>
- <version>2.1</version>
+ <version>${hamcrest.version}</version>
  <scope>test</scope>
  </dependency>
  <dependency>
  <groupId>org.hamcrest</groupId>
  <artifactId>hamcrest-core</artifactId>
- <version>2.1</version>
+ <version>${hamcrest.version}</version>
  <scope>test</scope>
  </dependency>
  <dependency>