chore: create dependabot.yml

[MichaelDeBoey]

Since this action is already using dependabot-preview, let's use the newest Dependabot version

[codecov]

Codecov Report

Merging #275 (8fea695) into master (9b0b9bb) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #275   +/-   ##
=======================================
  Coverage   96.42%   96.42%           
=======================================
  Files           3        3           
  Lines         140      140           
  Branches       43       43           
=======================================
  Hits          135      135           
  Misses          5        5           

Flag	Coverage Δ
demo	87.50% <ø> (ø)
script	97.58% <ø> (ø)

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Impacted Files	Coverage Δ
src/buildExec.ts	97.58% <0.00%> (ø)

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[thomasrockhu]

@MichaelDeBoey sorry for taking so long with this. Going to close out in favor of #298