Prepare final V1 release

Author: kacpnowak

pyproject.toml

@@ -7,7 +7,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "implicit_filter"
-version = "1.1.0"
+version = "1.2.0"
 description = "Python package implementing implicit filtering method on any type of mesh."
 readme = "readme.md"
 authors = [{ name = "Kacper Nowak", email = "kacper.nowak@awi.de" }]