Fix phpdoc for JsonSchena::setType()

[simivar]

The type definition in setType method can be updated as the property itself accepts string too

[codecov[bot]]

Codecov Report

Merging #154 (447303e) into master (2d7b8e2) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 447303e differs from pull request most recent head ac6bfe9. Consider uploading reports for the commit ac6bfe9 to get more accurate results

@@           Coverage Diff           @@
##           master     #154   +/-   ##
=======================================
  Coverage   92.64%   92.64%           
=======================================
  Files          27       27           
  Lines        1687     1687           
=======================================
  Hits         1563     1563           
  Misses        124      124           

Files Changed	Coverage Δ
src/JsonSchema.php	100.00% <ø> (ø)

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[vearutop]

Thank you!