Upgrade Maven plugins

Upgrade Maven plugins so that they work with JDK9

Author: snicoll

spring-boot-dependencies/pom.xml

@@ -204,7 +204,7 @@
 		<maven-enforcer-plugin.version>1.4</maven-enforcer-plugin.version>
 		<maven-failsafe-plugin.version>2.18.1</maven-failsafe-plugin.version>
 		<maven-install-plugin.version>2.5.2</maven-install-plugin.version>
-		<maven-invoker-plugin.version>1.10</maven-invoker-plugin.version>
+		<maven-invoker-plugin.version>3.0.0-SNAPSHOT</maven-invoker-plugin.version>
 		<maven-help-plugin.version>2.2</maven-help-plugin.version>
 		<maven-jar-plugin.version>3.0.2</maven-jar-plugin.version>
 		<maven-javadoc-plugin.version>2.10.4</maven-javadoc-plugin.version>
@@ -213,7 +213,7 @@
 		<maven-site-plugin.version>3.5.1</maven-site-plugin.version>
 		<maven-source-plugin.version>3.0.1</maven-source-plugin.version>
 		<maven-surefire-plugin.version>2.18.1</maven-surefire-plugin.version>
-		<maven-war-plugin.version>2.6</maven-war-plugin.version>
+		<maven-war-plugin.version>3.1.0</maven-war-plugin.version>
 		<versions-maven-plugin.version>2.3</versions-maven-plugin.version>
 	</properties>
 	<dependencyManagement>