luaPackages: various cosmetic fixes
luaPackages: various cosmetic fixes

These involve:

- Formatting and spacing.
- Switching to using fetchFromGitHub where possible.
- Adding missing meta attributes.
  - Correcting license values or adding missing license values.
  - Adding vyp as maintainer for unmaintained packages.

None of these changes should affect the build result.

A different revision is used for luasqlite3, however, the source code
between these revisions is actually the same. (And the advantage is that
the new revision is a tagged release.)

SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs