chore(release): 2.0.0 [skip ci]

# [2.0.0](v1.2.1...v2.0.0) (2021-06-25)

### Bug Fixes

* rename sum to add ([0b9f9a4](0b9f9a4))

### BREAKING CHANGES

* function sum renamed

Author: semantic-release-bot

setup.cfg

@@ -1,3 +1,3 @@
 [metadata]
-version = 1.2.1
+version = 2.0.0