Fix: Rename interface

[localheinz]

This pull request

• renames Format\FormatterInterface to Format\Formatter

[codecov]

Codecov Report

Merging #673 (7a55291) into main (c61a58d) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #673   +/-   ##
=========================================
  Coverage     99.04%   99.04%           
  Complexity      146      146           
=========================================
  Files            32       32           
  Lines           521      521           
=========================================
  Hits            516      516           
  Misses            5        5           

Impacted Files	Coverage Δ
src/AutoFormatNormalizer.php	100.00% <ø> (ø)
src/FixedFormatNormalizer.php	100.00% <ø> (ø)
src/Format/DefaultFormatter.php	100.00% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c61a58d...7a55291. Read the comment docs.