What's Changed
* Change coords value type to float by ehuang94 in https://github.com/DNPLab/DNPLab/pull/486
* Add Example for Referencing to Toluene Example by ehuang94 in https://github.com/DNPLab/DNPLab/pull/485
* unittest processing_helpers_SNR by Bkaribo in https://github.com/DNPLab/DNPLab/pull/484
* Fixing attributes in tnmr import module by thorstenmaly in https://github.com/DNPLab/DNPLab/pull/489
* Fix issue with setup.py by tkeller12 in https://github.com/DNPLab/DNPLab/pull/491
* Preparing to Release DNPLab v2.1.21 by tkeller12 in https://github.com/DNPLab/DNPLab/pull/492
**Full Changelog**: https://github.com/DNPLab/DNPLab/compare/v2.1.20...v2.1.21