Update pkg api to install master version

[vmiheer]

No description provided.

[codecov-commenter]

Codecov Report

Merging #914 (be06518) into master (8a98fb4) will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #914      +/-   ##
==========================================
- Coverage   68.03%   67.97%   -0.06%     
==========================================
  Files          20       20              
  Lines        1980     2033      +53     
==========================================
+ Hits         1347     1382      +35     
- Misses        633      651      +18     

Flag	Coverage Δ
unittests	67.97% <ø> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/pydates.jl	93.10% <0.00%> (-3.27%)	⬇️
src/pybuffer.jl	61.11% <0.00%> (-0.80%)	⬇️
src/exception.jl	60.74% <0.00%> (-0.80%)	⬇️
src/pyarray.jl	70.00% <0.00%> (-0.55%)	⬇️
src/pyeval.jl	70.47% <0.00%> (-0.12%)	⬇️
src/gui.jl	0.00% <0.00%> (ø)
src/conversions.jl	63.32% <0.00%> (+<0.01%)	⬆️
src/pyclass.jl	96.72% <0.00%> (+0.05%)	⬆️
src/pyfncall.jl	97.36% <0.00%> (+0.14%)	⬆️
src/io.jl	83.33% <0.00%> (+0.23%)	⬆️
... and 5 more

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