Remove international datestring parsing for version checks

[lawrence-mbf]

Fixes #508

Motivation

See #508

How to test the behavior?

Using a non-US locale, attempt to call datetime(version('-date')). A local error occurs (see #508)

Checklist

• Have you ensured the PR description clearly describes the problem and solutions?
• Have you checked to ensure that there aren't other open or previously closed Pull Requests for the same change?
• If this PR fixes an issue, is the first line of the PR description fix #XX where XX is the issue number?

[codecov]

Codecov Report

Merging #509 (af0db0a) into master (43cdffb) will not change coverage.
The diff coverage is 87.17%.

@@           Coverage Diff           @@
##           master     #509   +/-   ##
=======================================
  Coverage   87.89%   87.89%           
=======================================
  Files         129      129           
  Lines        5451     5451           
=======================================
  Hits         4791     4791           
  Misses        660      660           

Impacted Files	Coverage Δ
+io/parseDataset.m	83.33% <83.33%> (ø)
+tests/+unit/boolTest.m	95.83% <95.83%> (ø)

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