Install pyright with dependencies

noxfile.py

@@ -110,13 +110,6 @@ def tests(session: PowerSession, coverage, pkg_specs):
  # Important: do not surround the command into double quotes as in the shell !
  # session.run('python', '-c', 'import os; os.chdir(\'./docs/\'); import %s' % pkg_name)
 
- # Type checking is supported from python 3.7
- if float(session.python) >= 3.7:
- try:
- session.run2("npm install -g pyright@1.1.247")
- except CommandFailed:
- print("Failed to install pyright, typing tests would be skipped")
-
  # finally run all tests
  if not coverage:
  # install self so that it is recognized by pytest

setup.cfg

@@ -45,10 +45,9 @@ install_requires =
 tests_require =
  pytest
  pytest_cases
- # syrupy is used for snapshot testing with pyright,
- # pyright must be installed separately, we're not using https://pypi.org/project/pyright/
- # becouse it's just slow wrapper around node version.
+ # syrupy and pyright is used for testing type correctness.
  syrupy>2;python_version>'3.6'
+ pyright;python_version>'3.6'
  # for some reason these pytest dependencies were not declared in old versions of pytest
  six;python_version<'3.6'
  attr;python_version<'3.6'