Upgraded to Groovy-Eclipse version 4.2.0.

Author: fvgh

_ext/eclipse-groovy/CHANGES.md

@@ -3,6 +3,8 @@
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `3.5.0`).
 
 ## [Unreleased]
+### Added
+* Switch to Groovy-Eclipse release 4.2.0 for Eclipse 4.20 using Groovy 4.0.0 Alpha 3.
 
 ### Fixed
 * Fixed IndexOutOfBoundsException in parallel execution of `eclipse-groovy` formatter ([#877](https://github.com/diffplug/spotless/issues/877))

_ext/eclipse-groovy/gradle.properties

@@ -1,11 +1,14 @@
 artifactId=spotless-eclipse-groovy
 description=Groovy Eclipse's formatter bundled for Spotless
 
+# Build requirements
+VER_JAVA=11
+
 # Compile
-VER_ECLIPSE=4.19
+VER_ECLIPSE=4.20
 VER_SPOTLESS_ECLISPE_BASE=[3.4.2,4.0.0[
 VER_ECLISPE_JFACE=[3.15.300,4.0.0[
-VER_GRECLIPSE=4.1.0
+VER_GRECLIPSE=4.2.0
 VER_GROOVY=4.0.0
 # Use org.eclipse.jdt.core patched for Groovy-Eclipse
-VAR_GRECLIPSE_JDT_PATCH=3.25.0.v202103311613-e2103-RELEASE
+VAR_GRECLIPSE_JDT_PATCH=3.26.0.v202106301814-e2106-RELEASE