v2.12.0: Add CTRL-f / CTRL-b page scrolling

Support CTRL-f and CTRL-b for paging forward and backward, contributed
by @joshheyse in #395. Thanks!

Also in this release:

• Accept ESC as the escape character in LESS_TERMCAP_* variables
• Fix busy looping when reading from a pipe on Windows

v2.11.1: Resume moor after editor finishes

Before this release, when...

• Open a file in moor
• Press "v" to open it in an editor
• Exit the editor

... moor would exit.

With this release, moor will now instead continue where it left off.

Also in this release, filtering now performs better in certain cases.

v2.11.0: Suspend on CTRL-z

Also in this release, filtering is now faster, thanks to @plutonium-239
in #387. Thanks!

v2.10.5: Handle paging non-seekable files

Like this (in bash):

moor <(echo test)

Reported here: #385

v2.10.4: Fix bug pressing "n" at the bottom of the input

Before this release, searching for the next hit while at the bottom of
the input could sometimes get stuck doing nothing.

With this release, we should now correctly go to "not found" every time.

v2.10.3: Fix two crashes

Repro for crash one, happened when following empty files:

moor --follow /dev/null

Repro for crash two:

1. moor somefile.txt
2. Scale terminal window so it's one character high
3. Press down arrow
4. Boom!

v2.10.2: Fix truncated lines in man pages

Also in this release:

• Chroma highlighter was updated (thanks @sebastianertz)
• Improved cleanup on shutdown (thanks @bet4it)

v2.10.1: Remove Options.Logger from the embedding API

It only covered log messages from twin (the console UI library), but
nothing from the actual pager.

In theory, this change should warrant a major version bump, but since
the logging in that API was just added I'll cross my fingers and hope
nobody started using it yet.

v2.10.0: Don't force logrus on twin users

Minor version bump since the embed API received another option for
providing a log implementation.

Also, this release bumps Chroma to a more recent version.

v2.9.6: Various updates

Reading large (hundreds of megabytes) streams is faster in this release.

In this release moor doesn't hang any more when reading files with
extremely long lines (hundreds of megabytes). Performance still isn't
great in this case, but it is better than before.

File names are now underlined by default in the status bar, thanks
@saeedark!

Some improvements to theming and syntax highlighting are in this release
due to upgrading Chroma.