`pip install -r requirements-dev.txt` hangs during resolving of deps between packages

System information

• OS Platform and Distribution (e.g., Linux Ubuntu 16.04): Ubuntu 20.04.2 LTS
• Modin installed from (source or binary): source
• Modin version: 7a8158873e77cb5f1a5a3b89be4ddac89f576269
• Python version: 3.8.12
• Exact command to reproduce:

pip install -r requirements-dev.txt

Describe the problem

Installing of requirements for Modin development via pip hangs during resolving dependencies in clean environment. But env can be successfully created (but it will take a lot of time) with conda approach.

Source code / logs

Collecting bokeh!=2.0.0,>=1.0.0
  Using cached bokeh-2.4.0-py3-none-any.whl (18.4 MB)
INFO: This is taking longer than usual. You might need to provide the dependency resolver with stricter constraints to reduce runtime. If you want to abort this run, you can press Ctrl + C to do so. To improve how pip performs, tell us what happened here: https://pip.pypa.io/surveys/backtracking
  Using cached bokeh-2.3.3.tar.gz (10.7 MB)
  Using cached bokeh-2.3.2.tar.gz (10.7 MB)
  Using cached bokeh-2.3.1.tar.gz (10.6 MB)
  Using cached bokeh-2.3.0.tar.gz (10.6 MB)
  Using cached bokeh-2.2.3.tar.gz (8.8 MB)
  Using cached bokeh-2.2.2.tar.gz (8.8 MB)
INFO: pip is looking at multiple versions of botocore to determine which version is compatible with other requirements. This could take a while.
INFO: pip is looking at multiple versions of bokeh to determine which version is compatible with other requirements. This could take a while.
  Using cached bokeh-2.2.1.tar.gz (8.8 MB)
  Using cached bokeh-2.2.0.tar.gz (8.8 MB)
  Using cached bokeh-2.1.1.tar.gz (19.3 MB)
  Using cached bokeh-2.1.0.tar.gz (19.3 MB)
  Using cached bokeh-2.0.2.tar.gz (8.6 MB)
INFO: This is taking longer than usual. You might need to provide the dependency resolver with stricter constraints to reduce runtime. If you want to abort this run, you can press Ctrl + C to do so. To improve how pip performs, tell us what happened here: https://pip.pypa.io/surveys/backtracking
INFO: This is taking longer than usual. You might need to provide the dependency resolver with stricter constraints to reduce runtime. If you want to abort this run, you can press Ctrl + C to do so. To improve how pip performs, tell us what happened here: https://pip.pypa.io/surveys/backtracking
  Using cached bokeh-2.0.1.tar.gz (8.6 MB)
  Using cached bokeh-1.4.0.tar.gz (32.4 MB)
  Using cached bokeh-1.3.4.tar.gz (17.8 MB)
  Using cached bokeh-1.3.2.tar.gz (17.8 MB)
  Using cached bokeh-1.3.1.tar.gz (17.9 MB)
  Using cached bokeh-1.3.0.tar.gz (17.8 MB)
  Using cached bokeh-1.2.0.tar.gz (17.6 MB)
  Using cached bokeh-1.1.0.tar.gz (17.5 MB)
  Using cached bokeh-1.0.4.tar.gz (16.3 MB)
  Using cached bokeh-1.0.3.tar.gz (16.3 MB)
  Using cached bokeh-1.0.2.tar.gz (16.2 MB)
  Using cached bokeh-1.0.1.tar.gz (16.1 MB)
  Using cached bokeh-1.0.0.tar.gz (16.1 MB)
INFO: pip is looking at multiple versions of attrs to determine which version is compatible with other requirements. This could take a while.
Collecting attrs
  Using cached attrs-20.3.0-py2.py3-none-any.whl (49 kB)
  Using cached attrs-20.2.0-py2.py3-none-any.whl (48 kB)

[Garra1980]

I tried

diff --git a/requirements-dev.txt b/requirements-dev.txt
index 55ed2d4a..c5bb56ed 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -14,14 +14,14 @@ scipy
 s3fs>=2021.8
 pytest
 pytest-benchmark
-coverage<5.0
+coverage
 pytest-cov
 pytest-xdist
 feather-format
 lxml
 openpyxl
 xlrd
-matplotlib<=3.2.2
+matplotlib
 sqlalchemy>=1.4.0
 msgpack
 pandas_gbq

and installation was successful

[prutskov]

The PRs which added pins:

1. coverage https://github.com/modin-project/modin/pull/916
2. matplotlib https://github.com/modin-project/modin/pull/1748

I confirm, that unpinning helps with successful environment dependencies creation.