Add unit testing for uppercase/lowercase

v0.1.7

New tests for uppercase changes

Uppercase German '\u00df' 'ß' as '\u1e9e' 'ẞ' (note that's not 2 Ss!)

Note that this is considered rather controversial - I may need to make some flag to select the behaviour.
This transformation was only approved a year ago in Germany, and is not reflected in the standard Unicode tables.
This was done simply to retain compatibility with the uppercase function in Julia.

Cap Julia version to < v2, update Project.toml version

v0.1.5

Cap at Julia v2

Fix another issue for Julia v1.0 with % and <<

v0.1.4

Handle issue with % for v1.0

Passing all tests, v06 - nightlies

v0.1.3

Update shifts with % or & for v1.0

Update for Pkg3 changes

v0.1.2

Update README.md and badges

Update Project.toml

v0.1.1

Update Project.toml

Initial Release

v0.1.0

Remove versions