Feature/ggspatial

[iskandari]

• replaces ggmap with ggspatial
• removal of calls to download_basemap()
• addition of ggspatial to includes; rosm and prettymapr to suggests

[codecov[bot]]

Codecov Report

Merging #639 (1d588af) into master (2f9df62) will increase coverage by 0.05%. Report is 5 commits behind head on master. The diff coverage is 30.61%.

:exclamation: Current head 1d588af differs from pull request most recent head 0f33222. Consider uploading reports for the commit 0f33222 to get more accurate results

@@            Coverage Diff             @@
##           master     #639      +/-   ##
==========================================
+ Coverage   82.02%   82.07%   +0.05%     
==========================================
  Files          61       60       -1     
  Lines        3699     3665      -34     
==========================================
- Hits         3034     3008      -26     
+ Misses        665      657       -8     

Files	Coverage Δ
R/color_scale.R	50.00% <ø> (-5.56%)	:arrow_down:
R/composite_ppi.R	44.18% <ø> (ø)
R/integrate_to_ppi.R	95.45% <ø> (ø)
R/bioRad-deprecated.R	0.00% <0.00%> (ø)
R/download_pvolfiles.R	91.89% <83.33%> (-1.96%)	:arrow_down:
R/map.R	24.21% <14.28%> (-1.64%)	:arrow_down: