Bump our minimum required gradle from 6.1 to 6.1.1.

Author: nedtwigg

plugin-gradle/CHANGES.md

@@ -5,6 +5,7 @@ We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (
 ## [Unreleased]
 ### Changed
 * **BREAKING** Previously, many projects required `buildscript { repositories { mavenCentral() }}` at the top of their root project, because Spotless resolved its dependencies using the buildscript repositories. Spotless now resolves its dependencies from the normal project repositories of the root project, which means that you can remove the `buildscript {}` block, but you still need `repositories { mavenCentral() }` (or similar) in the root project.
+* Bump minimum required Gradle from `6.1` to `6.1.1`.
 
 ## [5.17.1] - 2021-10-26
 ### Changed

plugin-gradle/README.md

@@ -130,7 +130,7 @@ All the generic steps live in [`FormatExtension`](https://javadoc.io/doc/com.dif
 
 ### Requirements
 
-Spotless requires JRE 8+, and Gradle 5.4+.  Some steps require JRE 11+, `Unsupported major.minor version` means you're using a step that needs a newer JRE.
+Spotless requires JRE 8+, and Gradle 6.1.1+.  Some steps require JRE 11+, `Unsupported major.minor version` means you're using a step that needs a newer JRE.
 
 If you're stuck on an older version of Gradle, `id 'com.diffplug.gradle.spotless' version '4.5.1'` supports all the way back to Gradle 2.x`.
 

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/SpotlessPlugin.java

@@ -24,7 +24,7 @@
 
 public class SpotlessPlugin implements Plugin<Project> {
 	static final String SPOTLESS_MODERN = "spotlessModern";
-	static final String MINIMUM_GRADLE = "6.1";
+	static final String MINIMUM_GRADLE = "6.1.1";
 
 	@Override
 	public void apply(Project project) {