Create dependabot.yml

[ranocha]

This allows to get updates for GitHub actions automatically - it is basically an equivalent of CompatHelper. I have used this for my own packages, the Trixi.jl framework, and the SciML organization. After merging this, you could also enable other Dependabot actions in 'Settings -> Code security and analysis -> Dependabot alerts' and '... -> Dependabot security updates'.

See https://github.com/SciML/MuladdMacro.jl/pull/37

[codecov[bot]]

Codecov Report

Merging #148 (40646a7) into master (61d333f) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #148   +/-   ##
=======================================
  Coverage   91.49%   91.49%           
=======================================
  Files           6        6           
  Lines         341      341           
=======================================
  Hits          312      312           
  Misses         29       29           

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