Update MAT requirement from 0.10, 0.11 to 0.10, 0.11, 0.12 in /KomaMRIPlots

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Updates the requirements on MAT to permit the latest version.

Release notes

Sourced from MAT's releases.

v0.12.0

MAT v0.12.0

Diff since v0.11.5

Breaking changes

• Read-write behavior of Char arrays has been changed. This was ill-defined up to now
• Empty strings are now returned as String[] instead of ""
• Strings in arrays are no longer trimmed automatically to keep read-write behavior consistent.

New features

• Better Char array support, including unicode

Fixes:

• mat v7.3 (HDF5 format) performance issue fixed

Merged pull requests:

• RW for char arrays with unicode support (#234) (@​foreverallama)
• avoid HDF5.name when possible (#238) (@​matthijscox)

Closed issues:

• Incremental reading of complex matrix from MatlabHDF5File (#76)
• Function handle support (#221)
• HDF5 slow reading performance (#237)

Commits

• See full diff in compare view

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.23%. Comparing base (531036c) to head (5036bfe).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #746      +/-   ##
==========================================
+ Coverage   89.15%   89.23%   +0.08%     
==========================================
  Files          62       62              
  Lines        3357     3382      +25     
==========================================
+ Hits         2993     3018      +25     
  Misses        364      364              

Flag	Coverage Δ
base	90.86% <ø> (+0.23%)	⬆️
core	77.44% <ø> (+4.37%)	⬆️
files	95.63% <ø> (+0.14%)	⬆️
komamri	88.13% <ø> (-5.99%)	⬇️
plots	91.00% <ø> (ø)

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see 14 files with indirect coverage changes

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