Upgrade to Hamcrest 2.2

Closes spring-projectsgh-18922

Author: wilkinsona

spring-boot-project/spring-boot-cli/src/test/java/org/springframework/boot/cli/command/install/GroovyGrabDependencyResolverTests.java

@@ -115,7 +115,7 @@ void resolveMultipleArtifacts() throws Exception {
 				.resolve(Arrays.asList("junit:junit:4.11", "commons-logging:commons-logging:1.1.3"));
 		assertThat(resolved).hasSize(4);
 		assertThat(getNames(resolved)).containsOnly("junit-4.11.jar", "commons-logging-1.1.3.jar",
-				"hamcrest-core-2.1.jar", "hamcrest-2.1.jar");
+				"hamcrest-core-2.2.jar", "hamcrest-2.2.jar");
 	}
 
 	Set<String> getNames(Collection<File> files) {

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -69,7 +69,7 @@
 		<groovy.version>2.5.8</groovy.version>
 		<gson.version>2.8.6</gson.version>
 		<h2.version>1.4.200</h2.version>
-		<hamcrest.version>2.1</hamcrest.version>
+		<hamcrest.version>2.2</hamcrest.version>
 		<hazelcast.version>3.12.4</hazelcast.version>
 		<hazelcast-hibernate5.version>1.3.2</hazelcast-hibernate5.version>
 		<hibernate.version>5.4.8.Final</hibernate.version>