feature_request(unicode): disable CROSS MARK symbol from output

[Kristinita]

1. Summary

It would be nice, if CROSS MARK symbol will not add to console output.

2. Argumentation

Different terminal behavior.

Compare line of output for Cygwin and ConEmu:

Cygwin:

01:016 ❌ invalid newline: crlf, expected: lf (EditorConfig end_of_line https://goo.gl/te3t0s)

ConEmu:

01:016 ❌️ invalid newline: crlf, expected: lf (EditorConfig end_of_line https://goo.gl/te3t0s)

In ConEmu output I get VARIATION SELECTOR-16 symbol in each line.

It may create some problems in debugging process, examples:

1. User can have a different file size, if run same command in different operating systems/terminals. User may not understand the reasons.
2. File comparison tools show differences for each line.

3. Environment

• Windows 10 Enterprise LTSB 64-bit EN,
• Cygwin 2.10.0,
• ConEmu 171205 [64],
• eclint 2.6.0.

4. Example

For one of my big projects:

ConEmu:

eclint check > SashaEClintWindows.txt 2>&1

SashaEClintWindows.txt — 1515 KB. Lines with VARIATION SELECTOR-16.

Cygwin:

eclint check &> SashaEClintCygwin.txt

SashaEClintCygwin.txt — 1473 KB. Lines without VARIATION SELECTOR-16.

I get same output, but different file size because of VARIATION SELECTOR-16 symbol.

Thanks.

[gucong3000]

Upstream issues：https://github.com/gucong3000/gulp-reporter/issues/237