update OMT version (#331)

TomPohys · web-flow · commit 5bb5ea00b28d · 2020-10-26T17:52:01.000+02:00
* update version OMT before release 5.3.1
diff --git a/openmaptiles/__init__.py b/openmaptiles/__init__.py
@@ -1 +1 @@
-__version__ = "5.2.0"
+__version__ = "5.3.1"
