PYTHON-3030 Add support for PyMongo 4.0 (#38)

Author: blink1073

bindings/python/README.rst

@@ -60,6 +60,11 @@ installed::
 Currently, PyMongoArrow wheels are only available for macOS and Linux
 on x86_64 architectures.
 
+Development Install
+===================
+
+See the instructions on `Read the Docs <https://mongo-arrow.readthedocs.io/en/latest/developer/installation.html>`_.
+
 Documentation
 =============
 Full documentation is available on `Read the Docs <https://mongo-arrow.readthedocs.io/en/latest/>`_.

bindings/python/docs/source/developer/installation.rst

@@ -45,10 +45,14 @@ On macOS, users can install the latest ``libbson`` via Homebrew::
 Build
 -----
 
-In the previously created virtualenv, we first install all build dependencies
+In the previously created virtualenv, we first install all build and test dependencies
 of PyMongoArrow::
 
-  (pymongoarrow) $ pip install -r requirements/build.txt
+  (pymongoarrow) $ pip install -r requirements/test.txt
+
+We also need the pyarrow library symlinks, which can be created as follows::
+ 
+  (pymongoarrow) $ python -c 'import pyarrow as pa; pa.create_library_symlinks()'
 
 We can now install ``pymongoarrow`` in **development mode** as follows::
 

bindings/python/setup.py

@@ -17,7 +17,7 @@
 
 # Keep these dependencies synced with those in requirements/*.txt
 PYARROW_DEP = 'pyarrow>=6,<6.1'
-PYMONGO_DEP = 'pymongo>=3.11,<4'
+PYMONGO_DEP = 'pymongo>=3.11,<5'
 INSTALL_REQUIRES = [PYARROW_DEP, PYMONGO_DEP]
 SETUP_REQUIRES = ['setuptools>=47', 'cython>=0.29', PYARROW_DEP]