chore(release): 2.0.0-beta.3

CHANGELOG.md

+# Changelog
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+## [2.0.0-beta.3](https://github.com/jag1g13/pycgtool/compare/v2.0.0-beta.2...v2.0.0-beta.3) (2021-08-14)
+
+
+### Bug Fixes
+
+* avoid bond calc and traj output when no atoms ([ba0e5ab](https://github.com/jag1g13/pycgtool/commit/ba0e5ab1339f1f2821a0edb08a5b7f661c9ac29f)), closes [#51](https://github.com/jag1g13/pycgtool/issues/51)
+* catch zero volume PDB box and warn ([61a5b80](https://github.com/jag1g13/pycgtool/commit/61a5b809e0cd4dffaf3e2e2bbe2ab74fcc0488aa))
+* handle empty output frames correctly ([3d4b9ad](https://github.com/jag1g13/pycgtool/commit/3d4b9adccce32c95d4114c994133d3db6efd1556)), closes [#51](https://github.com/jag1g13/pycgtool/issues/51)