Version bump to 0.1.2

[nrweir]

• Added 3 models from selim_sef's SpaceNet 4 submission!
• Completed tutorials in the documentation!
• Version bumps of a number of dependencies
• Some other small bugfixes and added functionality (vector_tiler null output #197, etc.)

[codecov-io]

Codecov Report

Merging #206 into master will decrease coverage by 5.09%.
The diff coverage is 28.92%.

@@            Coverage Diff            @@
##           master     #206     +/-   ##
=========================================
- Coverage   71.33%   66.23%   -5.1%     
=========================================
  Files          65       67      +2     
  Lines        4064     4561    +497     
=========================================
+ Hits         2899     3021    +122     
- Misses       1165     1540    +375

Impacted Files	Coverage Δ
setup.py	0% <ø> (ø)	⬆️
solaris/utils/config.py	17.64% <0%> (-2.36%)	⬇️
solaris/nets/zoo/xdxd_sn4.py	25% <100%> (ø)
tests/test_vector/test_mask.py	100% <100%> (ø)	⬆️
solaris/nets/zoo/__init__.py	100% <100%> (ø)
solaris/__init__.py	100% <100%> (ø)	⬆️
solaris/nets/__init__.py	100% <100%> (ø)	⬆️
tests/test_raster/test_image.py	100% <100%> (ø)	⬆️
solaris/nets/optimizers.py	23.43% <12.72%> (-67.48%)	⬇️
solaris/nets/model_io.py	22.22% <18.18%> (+1.16%)	⬆️
... and 14 more

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