Bump to Flowless 0.6.7

Author: Jugen

richtextfx/build.gradle

@@ -35,7 +35,7 @@ sourceSets {
 dependencies {
     api group: 'org.reactfx', name: 'reactfx', version: '2.0-M5'
     api group: 'org.fxmisc.undo', name: 'undofx', version: '2.1.1'
-    api group: 'org.fxmisc.flowless', name: 'flowless', version: '0.6.5'
+    api group: 'org.fxmisc.flowless', name: 'flowless', version: '0.6.7'
     api group: 'org.fxmisc.wellbehaved', name: 'wellbehavedfx', version: '0.3.3'
 
     java9Implementation files(sourceSets.main.output.classesDirs) { builtBy compileJava }