Fix up Cargo.toml metadata

Update Cargo.toml include

Remove miri from CI

No unsafe code makes in unnecessary

Make all code compile and tests pass on MSRV

Bump msrv-shell to 1.63

Update _incr_version script

Use --all-targets flag on CI build checks

Add helper get methods

Add get_localized_name example

Remove low_level error type from high_level

Improve doc comments

Add fuzzing setup

Add support for line continuations in values

Add llvm-tools-preview for code coverage reports

Fix Cargo.toml includes

Revamp the high level API to use no unsafe code

Add string low level functions

Add back rust-src to miri shell

Change MSRV to 1.61.0 and add MSRV check

Update to Rust 2021