ripgrep 0.5.0

This is a new minor version release of ripgrep that includes one minor breaking change, bug fixes and several new features including support for text encodings other than UTF-8.

A notable accomplishment with respect to Rust is that ripgrep proper now only contains a single unsafe use (for accessing the contents of a memory map).

The breaking change is:

FEATURE #380: Line numbers are now hidden by default when ripgrep is printing to a tty and the only thing searched is stdin.

Feature enhancements:

Added or improved file type filtering for Ceylon, CSS, Elixir, HTML, log, SASS, SVG, Twig
FEATURE #1: Add support for additional text encodings, including automatic detection for UTF-16 via BOM sniffing. Explicit text encoding support with the -E/--encoding flag was also added for latin-1, GBK, EUC-JP and Shift_JIS, among others. The full list can be found here: https://encoding.spec.whatwg.org/#concept-encoding-get
FEATURE #129: Add a new -M/--max-columns flag that omits lines longer than the given number of bytes. (Disabled by default!)
FEATURE #369: A new flag, --max-filesize, was added for limiting searches to files with a maximum file size.

Bug fixes:

BUG #52, BUG #311: Tweak how binary files are detected and handled. (We are slightly less conservative and will no longer use memory without bound.)
BUG #326: When --files flag is given, we should never attempt to parse positional arguments as regexes.
BUG #327: Permit the --heading flag to override the --no-heading flag.
BUG #340: Clarify that the -u/--unrestricted flags are aliases.
BUG #343: Global git ignore config should use $HOME/.config/git/ignore and not $HOME/git/ignore.
BUG #345: Clarify docs for -g/--glob flag.
BUG #381: Add license files to each sub-crate.
BUG #383: Use latest version of clap (for argv parsing).
BUG #392: Fix translation of set globs (e.g., {foo,bar,quux}) to regexes.
BUG #401: Add PowerShell completion file to Windows release.
BUG #405: Fix bug when excluding absolute paths with the -g/--glob flag.