Circular import breaking httpie.output.formatters.colors import

[bsolomon1124]

httpie/httpie/output/formatters/colors.py imports from from httpie.plugins, which imports ColorFormatter, and so on ...

Python 3.8 output:

$ python -m pip install -U pip wheel setuptools pygments httpie
$ python
Python 3.8.3 (default, May 19 2020, 21:34:17) 
[Clang 11.0.0 (clang-1100.0.33.12)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from httpie.output.formatters.colors import get_lexer
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/brad/Scripts/python/envs/venv/lib/python3.8/site-packages/httpie/output/formatters/colors.py", line 20, in <module>
    from httpie.plugins import FormatterPlugin
  File "/Users/brad/Scripts/python/envs/venv/lib/python3.8/site-packages/httpie/plugins/__init__.py", line 14, in <module>
    from httpie.output.formatters.colors import ColorFormatter
ImportError: cannot import name 'ColorFormatter' from partially initialized module 'httpie.output.formatters.colors' (most likely due to a circular import) (/Users/brad/Scripts/python/envs/venv/lib/python3.8/site-packages/httpie/output/formatters/colors.py)

3.7:

$ python
Python 3.7.7 (default, Apr  9 2020, 18:09:52) 
[Clang 11.0.0 (clang-1100.0.33.12)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from httpie.output.formatters.colors import get_lexer
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/brad/Scripts/python/envs/venv/lib/python3.7/site-packages/httpie/output/formatters/colors.py", line 20, in <module>
    from httpie.plugins import FormatterPlugin
  File "/Users/brad/Scripts/python/envs/venv/lib/python3.7/site-packages/httpie/plugins/__init__.py", line 14, in <module>
    from httpie.output.formatters.colors import ColorFormatter
ImportError: cannot import name 'ColorFormatter' from 'httpie.output.formatters.colors' (/Users/brad/Scripts/python/envs/venv/lib/python3.7/site-packages/httpie/output/formatters/colors.py)

Which can be addressed with this hack:

>>> from httpie.plugins import *
>>> from httpie.output.formatters.colors import get_lexer

[jkbrzt]

Fixed, thanks!