[WIP] updates for napari 0.2.0 release

[sofroniewn]

This PR will update starfish.display for the 0.2.0 release of napari which is planned imminently but has not happened yet. I still need to test it out more thoroughly, but wanted to make the changes that I know we'll need to make

[codecov-io]

Codecov Report

Merging #1591 into master will increase coverage by 0.06%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master    #1591      +/-   ##
==========================================
+ Coverage   87.59%   87.66%   +0.06%     
==========================================
  Files         146      146              
  Lines        5053     5049       -4     
==========================================
  Hits         4426     4426              
+ Misses        627      623       -4

Impacted Files	Coverage Δ
starfish/core/_display.py	23.59% <50%> (+1.01%)	⬆️

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[sofroniewn]

I'm confused why the tests are passing - after #1570 they should break as I've added code that should break the version of napari currently on pypi 0.1.5

[ttung]

Napari tests are only run on master, or branches with the suffix '-alltest'

[sofroniewn]

Closing in favour of #1599 which has the correct branch name and the only changes that are actually needed