rhysd/hgrep v0.3.6 on GitHub

Add -u/--unrestricted flags to built-in ripgrep (ripgrep feature). This flag reduces the level of "smart" filtering by repeated uses (up to 2). A single flag -u is equivalent to --no-ignore. Two flags -uu are equivalent to --no-ignore --hidden. Unlike ripgrep, three flags -uuu are not supported since hgrep doesn't support --binary flag.
```
# Same as `hgrep --no-ignore pattern paths...`
hgrep -u pattern paths...
# Same as `hgrep --no-ignore --hidden pattern paths...`
hgrep -uu pattern paths...
```
Allow command line options to override their previous values. For example, hgrep --theme ayu-dark --theme OneHalfDark specifies OneHalfDark theme, which previously caused a command line parse error. This new behavior is useful when you specify a default option in HGREP_DEFAULT_OPTS and want to override the default value in a command line.
```
# Set the default theme value
export HGREP_DEFAULT_OPTS='--theme ayu-dark'
# v0.3.5 caused an error and v0.3.6 now allows this
hgrep --theme OneHalfDark pattern paths...
```
A Debian package (.deb file) is now released in the release page. For example the package file for v0.3.6 can be downloaded from this link. The package can be installed via dpkg command and managed by APT package manager. It installs the man page and bash completion file automatically. Please see the document for more details. (#17)
Fix redundant imports warning reported from a nightly compiler.