search config file in user directory

[randy3k]

It is useful when linting single script files.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@22d7499). Click here to learn what that means.
The diff coverage is 80%.

@@           Coverage Diff            @@
##             master    #266   +/-   ##
========================================
  Coverage          ?   86.1%           
========================================
  Files             ?      39           
  Lines             ?    2188           
  Branches          ?       0           
========================================
  Hits              ?    1884           
  Misses            ?     304           
  Partials          ?       0

Impacted Files	Coverage Δ
R/settings.R	93.87% <80%> (ø)

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[jimhester]

Thanks! I merged this manually c392b00

[randy3k]

Thank for considering it.