v0.1.2 - Additional modern pressure determination strategies

Implemented two other pressure determination methods to pRuby, including Ruby2020, which aims to provide a universal standard for pressure determination and Jacobsen method which should be especially precise when using helium as pressure medium. Set the first method as default for the program. Implemented metadata, such as publication year and reference in class metadata and prepared a str dunder method based on them. Updated about and README.

What's Changed

• Ruby2020 by @Baharis in #5

Full Changelog: v.0.1.1...v0.1.2