Github actions fix

[rdboyes]

Made the following edits to make github actions work properly:

• added a Project.toml file to the test directory for dependencies
• formatted the tests in runtests.jl differently so that they work with the test runner (other tests will need to be reformatted still, these are just examples)
• updated call to checkout v2 -> checkout v3 to silence deprecation warnings
• removed testing on julia 1.0 since it doesn't support the way occursin is used in the code with regular expressions

[kdpsingh]

Awesome, that was fast! Can't wait to take a look.