0.3.1 release

update readme.md

0.3.0 release

refactor change() functions (#6)

- refactor getter constants
- add return value to **change()** functions.
- rename **change()** functions, more descriptive
- update readme.md
- update GitHub actions
- update license 2023
- minor edits

0.2.2 release

add changelog.md (#5)

* add changelog.md

0.2.1 release

add change() functions for gas-law + minor edits (#4)

0.2.0 release

Develop (#3)

* fix setters and unit test

0.1.0 release

Develop (#1)

* initial version