Improve buildscript and bumped kotlin version
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..44b9a13
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,20 @@
+#
+# Copyright 2018 JetBrains s.r.o.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+kotlin.version=1.2.40
+
+org.gradle.parallel=true
+org.gradle.caching=true