message: update installation docs
diff: @@ -13,14 +13,11 @@ title = "Installing the mongocxx driver"
  - [CMake](https://cmake.org) 3.2 or later
  - [boost](https://www.boost.org) headers (optional)
  -We currently test the driver with the following configurations:
  +We currently test the driver on the following platforms:
  -&nbsp; | Linux | macOS | Windows
  --------|----------|-------------|-------------------
  - clang | 3.8 | 7.0 (Apple) | -
  - gcc | 4.8, 5.4 | - | -
  - VS | n/a | n/a | 14 (2015) Update 3
  - boost | - | 1.67.0 | 1.60.0
  +- Linux with clang 3.8, GCC 5.4 and 7.5
  +- macOS with Apple clang 7.0 and 11.0 using Boost 1.70.0
  +- Windows with Visual Studio 2015 using Boost 1.60.0 and Visual Studio 2017
  Versions older than the ones listed may not work and are not
  supported; use them at your own risk.
  @@ -71,7 +68,8 @@ must choose one of the following implementations for these features:
  Boost (*default for Windows platforms*)
  Select with `-DBSONCXX_POLY_USE_BOOST=1`. This is currently the
  - only option if you are using MSVC.
  + only option if you are using a version of MSVC that does not support
  + C++17.
  `std::experimental`
  Select with `-DBSONCXX_POLY_USE_STD_EXPERIMENTAL=1`. If your
  @@ -162,13 +160,13 @@ On Windows, this is the equivalent use of cmake:
  ```sh
  'C:\Program Files (x86)\CMake\bin\cmake.exe' .. \
  -G "Visual Studio 14 2015 Win64" \
  - -DBOOST_ROOT=C:\local\boost_1_59_0 \
  + -DBOOST_ROOT=C:\local\boost_1_60_0 \
  -DCMAKE_PREFIX_PATH=C:\mongo-c-driver \
  -DCMAKE_INSTALL_PREFIX=C:\mongo-cxx-driver
  ```
  The example above assumes:
  -* Boost is found in `C:\local\boost_1_59_0`.
  +* Boost is found in `C:\local\boost_1_60_0`.
  * `libmongoc` is found in `C:\mongo-c-driver`.
  * `mongocxx` is to be installed into `C:\mongo-cxx-driver`.
  