Updated release version and maintainers (#201)

- Updated version to 1.3.0 ahead of release.
- Removed inactive maintainer and added active maintainer.

Author: rdsharma26

pyproject.toml

@@ -1,9 +1,9 @@
 [tool.poetry]
 name = "pydeequ"
-version = "1.2.0"
+version = "1.3.0"
 description = "PyDeequ - Unit Tests for Data"
-authors = ["Calvin Wang <calviwan@amazon.com>", "Chenyang Liu <peterl@amazon.com>"]
-maintainers = ["Calvin Wang <calviwan@amazon.com>", "Chenyang Liu <peterl@amazon.com>"]
+authors = ["Chenyang Liu <peterl@amazon.com>", "Rahul Sharma <rdsharma@amazon.com>"]
+maintainers = ["Chenyang Liu <peterl@amazon.com>","Rahul Sharma <rdsharma@amazon.com>"]
 license = "Apache-2.0"
 readme = "README.md"
 homepage = "https://pydeequ.readthedocs.io"