Bump to version 1.1

CHANGELOG.md

+# Changelog
+
+## v1.0: Oct 17, 2019
+
+Initial release of ExaStencils
+
+## v1.1: Nov 16, 2021
+
+- Overhaul matrix and vector datatypes
+- New slot access signature
+- Features for GHODDESS
+  - Logical partition of quad cells into lower/upper triangle
+  - Modifications to domain initialization from file
+  - Flexible field selection for vtk output
+- Local solve function for systems of equations
+- Extended complex datatypes
+    
+
+