Updates checkstyle version

Sets allowSamelineSingleParameterlessAnnotation = true

Author: spencergibb

pom.xml

@@ -57,7 +57,7 @@
 		<maven-eclipse-plugin.version>2.10</maven-eclipse-plugin.version>
 		<!-- for backwards compatibility, use maven-checkstyle-plugin.version -->
 		<checkstyle.version>${maven-checkstyle-plugin.version}</checkstyle.version>
-		<puppycrawl-tools-checkstyle.version>9.3</puppycrawl-tools-checkstyle.version>
+		<puppycrawl-tools-checkstyle.version>12.1.2</puppycrawl-tools-checkstyle.version>
 		<spring-javaformat.version>0.0.47</spring-javaformat.version>
 		<maven-failsafe-plugin.version>3.5.4</maven-failsafe-plugin.version>
 		<maven-javadoc-plugin.version>3.12.0</maven-javadoc-plugin.version>

spring-cloud-build-tools/src/main/resources/checkstyle.xml

@@ -49,7 +49,7 @@
 		<module name="com.puppycrawl.tools.checkstyle.checks.annotation.PackageAnnotationCheck"/>
 		<module name="com.puppycrawl.tools.checkstyle.checks.annotation.AnnotationLocationCheck">
 			<property name="allowSamelineSingleParameterlessAnnotation"
-					  value="false"/>
+					  value="true"/>
 		</module>
 
 		<!-- Block Checks -->
@@ -121,7 +121,7 @@
 			<property name="authorFormat" value=".+\s.+"/>
 		</module>
 		<module name="com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocVariableCheck">
-			<property name="scope" value="public"/>
+			<property name="accessModifiers" value="public"/>
 		</module>
 		<module name="com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocStyleCheck"/>
 		<module name="com.puppycrawl.tools.checkstyle.checks.javadoc.NonEmptyAtclauseDescriptionCheck"/>