switch ci from travis to github actions

[guimarqu]

No description provided.

[codecov]

Codecov Report

Merging #15 (802b21b) into master (2a6f24d) will increase coverage by 0.42%.
The diff coverage is 97.26%.

@@            Coverage Diff             @@
##           master      #15      +/-   ##
==========================================
+ Coverage   97.98%   98.41%   +0.42%     
==========================================
  Files           7       10       +3     
  Lines         497      692     +195     
==========================================
+ Hits          487      681     +194     
- Misses         10       11       +1     

Impacted Files	Coverage Δ
src/DynamicSparseArrays.jl	100.00% <ø> (ø)
src/finds.jl	100.00% <ø> (ø)
src/moves.jl	100.00% <ø> (ø)
src/utils.jl	93.10% <ø> (+0.24%)	⬆️
src/writes.jl	100.00% <ø> (ø)
src/views.jl	87.50% <87.50%> (ø)
src/matrix.jl	95.00% <95.00%> (ø)
src/pma.jl	98.83% <96.66%> (+0.98%)	⬆️
src/pcsr.jl	98.81% <99.03%> (+1.50%)	⬆️
src/buffer.jl	100.00% <100.00%> (ø)
... and 9 more

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