Updated version in AppVeyor

appveyor.yml

@@ -1,4 +1,4 @@
-version: 6.4.0.{build}
+version: 6.9.1.{build}
 environment:
   matrix:
   - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017

scripts/publish.sh

@@ -18,12 +18,16 @@ update_version_in_source () {
 
 	sed -i~ -bE "4s/HEAD/$TAG ($DATE)/; 5s/-+/$UNDERLINE/" CHANGELOG.md
 	rm CHANGELOG.md*~
+
 	sed -i~ -bE "s/\"version\":.*$/\"version\": \"$VERSION\",/" library.json
 	rm library.json*~
 
 	sed -i~ -bE "s/version=.*$/version=$VERSION/" library.properties
 	rm library.properties*~
 
+	sed -i~ -bE "s/version: .*$/version: $VERSION.{build}/" appveyor.yml
+	rm appveyor.yml*~
+
 	sed -i~ -bE \
 		-e "s/ARDUINOJSON_VERSION .*$/ARDUINOJSON_VERSION \"$VERSION\"/" \
 		-e "s/ARDUINOJSON_VERSION_MAJOR .*$/ARDUINOJSON_VERSION_MAJOR $MAJOR/" \