Revert "eclipse-cdt update for 4.13 (#480)"

This reverts commit 85e2f33.

Author: nedtwigg

_ext/eclipse-cdt/CHANGES.md

@@ -1,9 +1,5 @@
 # spotless-eclipse-cdt
 
-### Version 9.9.0 - October 31st 2019 ([artifact]([jcenter](https://bintray.com/diffplug/opensource/spotless-eclipse-cdt)))
-
-* Switch to Eclipse CDT release 9.9 for Eclipse 4.13 ([#480](https://github.com/diffplug/spotless/issues/480)).
-
 ### Version 9.8.0 - July 24th 2019 ([artifact]([jcenter](https://bintray.com/diffplug/opensource/spotless-eclipse-cdt)))
 
 * Switch to Eclipse CDT release 9.8 for Eclipse 4.12 ([#423](https://github.com/diffplug/spotless/pull/423)).

_ext/eclipse-cdt/gradle.properties

@@ -1,7 +1,7 @@
 # Versions correspond to the Eclipse-CDT version used for the fat-JAR.
 # See https://www.eclipse.org/cdt/ for further information about Eclipse-CDT versions.
 # Patch version can be incremented independently for backward compatible patches of this library. 
-ext_version=9.9.0
+ext_version=9.8.0
 ext_artifactId=spotless-eclipse-cdt
 ext_description=Eclipse's CDT C/C++ formatter bundled for Spotless
 ext_org=diffplug
@@ -11,10 +11,11 @@ ext_group=com.diffplug.spotless
 ext_VER_JAVA=1.8
 
 # Compile dependencies
-VER_ECLIPSE_CDT=9.9
-VER_SPOTLESS_ECLISPE_BASE=[3.3.0,4.0.0[
-VER_ECLISPE_JFACE=[3.15.300,4.0.0[
-VER_ECLISPE_PLATFORM=[3.6.700,4.0.0[
+VER_ECLIPSE_CDT=9.7
+VER_SPOTLESS_ECLISPE_BASE=[3.2.0,4.0.0[
+VER_ECLISPE_JFACE=[3.12.0,4.0.0[
+VER_ECLISPE_WORKBENCH=[3.11.0,4.0.0[
+VER_ECLISPE_PLATFORM=[3.6.0,4.0.0[
 VER_IBM_ICU=[61,62[
 
 # Provided dependencies