Update openSUSE packages for python dependencies

The following python dependencies are out of date:

- [ ] https://software.opensuse.org/package/python3-argcomplete 1.0 vs ~=1.8
- [ ] https://software.opensuse.org/package/python3-pydocstyle 1.1.1 vs ~=2.0
- [ ] https://software.opensuse.org/package/python3-vim-vint 0.3.11 vs ~=0.3.12
- [ ] https://software.opensuse.org/package/python3-vulture 0.12 vs 0.1.4.0

And some where coala is out of date (we have bugs for each of these)
- libclang-py3 3.8.2 vs coala ~=3.4.0
- click 6.7 vs bears click == 6.6
- pyflakes 1.5 vs bears pyflakes ~= 1.4.0
- radon 1.4.2 vs bears radon==1.4.2
- safety 1.1.1 vs bears safety ~=0.5.1 (https://github.com/coala/coala-bears/issues/1684)
- ~~requests-mock~~
- yapf 0.16 vs yapf ~= 0.14.0
- lxml 3.7.3 vs lxml == 3.6.0

The issue names no files or tests; start by locating the dependency and package definitions used to build the docker-coala-base image. Compare them with the listed openSUSE and coala version requirements, update the compatible entries, and verify that the image build and dependency constraints remain consistent.

Written by the indexing model from the issue text.