rlua 0.19.0 released!

[jugglerchris]

[0.19.0]

• The Lua C library build now uses separate -sys crates, and bindgen rather than
  hand-maintained declarations. (Thanks @pollend!) The "builtin-lua51" feature
  is now available.
• Value::Integer is now no longer available when building for Lua 5.1. (In Lua 5.1
  there is no integer type).
• Add Function::dump() which produces the compiled version of a function (like
  the string.dump Lua function or lua_dump() C API).
• Add unsafe Chunk::into_function_allow_binary(). This allows loading a compiled
  binary generated from Function::dump().
• Add Initflags to control some settings done when Lua is initialised. They
  can be specified with the new unsafe Lua::unsafe_new_with_flags() constructor.
  The flags available (all set by default with the other constructors):
  • PCALL_WRAPPERS:
    • wrap pcall and xpcall so that they don't allow catching Rust panics
  • LOAD_WRAPPERS:
    • wrap functions load, loadfile, dofile (and loadstring for lua 5.1) to prevent
      loading compiled/bytecode modules.
  • REMOVE_LOADLIB:
    • Remove package.loadlib and the module finding functions which allow loading
      compiled C libraries.
• String<'lua> now implements Eq and Hash (can be useful for local collections
  within a context callback).