Add support for Factorio 0.18.x

Add option to bump patch number and override factorio_version in the
generated mod and update the serialize library to support the inventory
bar access methods of both 0.17 and 0.18.

mod/changelog.txt

@@ -1,4 +1,8 @@
 ---------------------------------------------------------------------------------------------------
+Version: 0.1.1
+  Features:
+    - Added support for Factorio 0.18.x
+---------------------------------------------------------------------------------------------------
 Version: 0.1.0
   Major Features:
     - API for mods to interact with Clusterio

mod/info.json

@@ -1,6 +1,6 @@
 {
     "name": "clusterio_lib",
-    "version": "0.1.0",
+    "version": "0.1.1",
     "title": "Clusterio Library (Alpha)",
     "author": "Clusterio Team",
     "homepage": "https://github.com/clusterio/factorioClusterio",