:checkhealth failed after upgrade module neovim to 0.3.1 (on python 3.7.1)

Expected result: :checkhealth all passed

Actual result:

## Python 3 provider (optional)
  - INFO: Using: g:python3_host_prog = "/usr/local/bin/python3"
  - INFO: Executable: /usr/local/bin/python3
  - ERROR: Command error (job=7): `'/usr/local/bin/python3' -c 'import sys; sys.path.remove(""); import neovim; print(neovim.__file__)'` (in '/Users/bruce/work/encoding-service')
    Output: Traceback (most recent call last):  File "<string>", line 1, in <module>ModuleNotFoundError: No module named 'neovim'
  - INFO: Python3 version: 3.7.1
  - INFO: python3-neovim version: unable to load neovim Python module
  - ERROR: Neovim Python client is not installed.
    Error: unable to load neovim Python module
    - ADVICE:
      - Run in shell: pip3 install neovim 

Steps to reproduce:

1. pip3 install neovim==0.3.1

2. pip3 show neovim

   Name: neovim
   Version: 0.3.1
   Summary: Transition packgage for pynvim
   Home-page: http://github.com/neovim/python-client
   Author: Thiago de Arruda
   Author-email: [e-mail]
   License: Apache
   Location: /usr/local/lib/python3.7/site-packages
   Requires: pynvim
   Required-by:
   

3. pip3 show pynvim

Name: pynvim
Version: 0.3.1
Summary: Python client to neovim
Home-page: http://github.com/neovim/python-client
Author: Thiago de Arruda
Author-email: [e-mail]
License: Apache
Location: /usr/local/lib/python3.7/site-packages
Requires: msgpack, greenlet
Required-by: neovim

1. nvim +checkhealth

health#LanguageClient#check
========================================================================
  - OK: binary found: /Users/bruce/.config/nvim/plugged/LanguageClient-neovim/bin/languageclient
  - OK: languageclient 0.1.127 229df982b764502c4e03b524ad3c14eb0db8e273

health#nvim#check
========================================================================
## Configuration
  - OK: no issues found

## Performance
  - OK: Build type: Release

## Remote Plugins
  - OK: Up to date

## terminal
  - INFO: key_backspace (kbs) terminfo entry: key_backspace=\177
  - INFO: key_dc (kdch1) terminfo entry: key_dc=\E[3~
  - INFO: $TERM_PROGRAM='iTerm.app'
  - INFO: $COLORTERM='truecolor'

health#provider#check
========================================================================
## Clipboard (optional)
  - OK: Clipboard tool found: pbcopy

## Python 2 provider (optional)
  - WARNING: No Python interpreter was found with the neovim module.  Using the first available for diagnostics.
  - ERROR: Python provider error
    - ADVICE:
      - provider/pythonx: Could not load Python 2:
          /usr/local/bin/python2 does not have the "neovim" module. :help |provider-python|
          /usr/local/bin/python2.7 does not have the "neovim" module. :help |provider-python|
          python2.6 not found in search path or not executable.
          /usr/local/bin/python does not have the "neovim" module. :help |provider-python|
  - INFO: Executable: Not found

## Python 3 provider (optional)
  - INFO: Using: g:python3_host_prog = "/usr/local/bin/python3"
  - INFO: Executable: /usr/local/bin/python3
  - ERROR: Command error (job=7): `'/usr/local/bin/python3' -c 'import sys; sys.path.remove(""); import neovim; print(neovim.__file__)'` (in '/Users/bruce/work/encoding-service')
    Output: Traceback (most recent call last):  File "<string>", line 1, in <module>ModuleNotFoundError: No module named 'neovim'
  - INFO: Python3 version: 3.7.1
  - INFO: python3-neovim version: unable to load neovim Python module
  - ERROR: Neovim Python client is not installed.
    Error: unable to load neovim Python module
    - ADVICE:
      - Run in shell: pip3 install neovim

## Ruby provider (optional)
  - INFO: Ruby: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-darwin17]
  - INFO: Host: /usr/local/bin/neovim-ruby-host
  - OK: Latest "neovim" gem is installed: 0.7.1

## Node.js provider (optional)
  - INFO: Node.js: v11.2.0
  - INFO: Neovim node.js host: /usr/local/lib/node_modules/neovim/bin/cli.js
  - OK: Latest "neovim" npm/yarn package is installed: 4.2.1

[number5]

Following the steps in docs like:

pip3 uninstall neovim
pip3 uninstall pynvim
pip3 install pynvim

fixed it.

It would be good if the error messages mentioned https://github.com/neovim/neovim/wiki/Following-HEAD#20181118 though.

[jaybocc2]

Can we at least reference this on the Readme? I had to dig a little more than was necessary to find out the package had been renamed.