ARROW-57 Update to latest libbson version (#59)

Author: blink1073

bindings/python/build-libbson.sh

@@ -5,7 +5,7 @@ set -o errexit
 
 # Version of libbson to build
 # Keep in sync with pymongoarrow.version._MIN_LIBBSON_VERSION
-LIBBSON_VERSION=${LIBBSON_VERSION:-"1.17.5"}
+LIBBSON_VERSION=${LIBBSON_VERSION:-"1.21.1"}
 if [ -z "$LIBBSON_VERSION" ]
 then
   echo "Did not provide a libbson revision ID to build"

bindings/python/docs/source/changelog.rst

@@ -8,6 +8,7 @@ Changes in Version 0.3.0
 - Improve error message when schema contains an unsupported type.
 - Add support for BSON string type.
 - Add support for BSON boolean type.
+- Upgraded to bundle ``libbson`` 1.21.1. If installing from source, the minimum supported ``libbson`` version is now 1.21.0.
 - Dropped Python 3.6 support (it was dropped in `PyArrow` 7.0).
 
 Changes in Version 0.2.0

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

@@ -35,7 +35,7 @@ libbson
 
 PyMongoArrow uses `libbson <http://mongoc.org/libbson/current/index.html>`_.
 Detailed instructions for building/installing ``libbson`` can be found
-`here <http://mongoc.org/libmongoc/1.17.5/installing.html#installing-the-mongodb-c-driver-libmongoc-and-bson-library-libbson>`_.
+`here <http://mongoc.org/libmongoc/1.21.0/installing.html#installing-the-mongodb-c-driver-libmongoc-and-bson-library-libbson>`_.
 
 You can either use a system-provided version of ``libbson`` that is properly
 configured for use with ``pkg-config``, or use the provided ``build-libbson.sh` ` script to build it::

bindings/python/pymongoarrow/version.py

@@ -14,4 +14,4 @@
 
 __version__ = "0.3.0.dev0"
 
-_MIN_LIBBSON_VERSION = "1.17.0"
+_MIN_LIBBSON_VERSION = "1.21.0"