Expanded tests, documentation, first fully supported compiler

Exhaustive Compiler Tests

As of this release,

• The tests cover each scenario in which the Fortran standard requires type finalization. 📖
• The NAG Fortran Compiler is the first tested compiler that passes the entire test suite. 🏆
• TheREADME.md files in the root and test/ directories detail the compiler support status. 🗼

What's Changed

• Update README.md with nvfortran and flang failures by @wyphan in #15
• Add PlantUML script for generating a UML class diagram by @rouson in #18
• Add more finalization test cases by @wyphan in #17
• Fix specification expression in compiler test by @rouson in #19
• doc(README): update compiler test failure tally by @rouson in #21
• doc(README): update description of compiler tests by @rouson in #23
• Write tests demonstrating typical usage by @everythingfunctional in #26
• Fix typo in compiler test description for check_finalize_on_end by @wyphan in #28
• Shallow copy test by @rouson in #31
• doc(README.md): fix typo by @rouson in #30

New Contributors

• @wyphan made their first contribution in #15
• @everythingfunctional made their first contribution in #26

Full Changelog: 1.0.0...1.1.0