Replace assertRegExp with assertMatchesRegularExpression in unit test

[phil-davis]

Fixes #507

To avoid:

There was 1 warning:

1) Sabre\VObject\CliTest::testRepair

assertRegExp() is deprecated and will be removed in PHPUnit 10. Refactor your code to use assertMatchesRegularExpression() instead.

e.g. https://travis-ci.org/github/sabre-io/dav/jobs/700622019 where the unit test fails in sabre-io/dav sabre-io/dav#1275

[phil-davis]

It's a PITA - the new assertMatchesRegularExpression does not seem to exist in phpunit 7 or 8. It is new in phpunit 9, and already there is a warning about it being removed in phpunit 10.

Looks like it needs some "if method exists" code.

I have done that and forced-pushed it.

[codecov]

Codecov Report

Merging #505 into master will increase coverage by 0.35%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #505      +/-   ##
============================================
+ Coverage     98.33%   98.69%   +0.35%     
  Complexity     1757     1757              
============================================
  Files            67       66       -1     
  Lines          4328     4279      -49     
============================================
- Hits           4256     4223      -33     
+ Misses           72       56      -16     

Impacted Files	Coverage Δ	Complexity Δ
lib/PHPUnitAssertions.php	91.66% <0.00%> (-0.34%)	7.00% <0.00%> (ø%)
lib/Component/VCalendar.php	94.59% <0.00%> (-0.15%)	64.00% <0.00%> (ø%)
lib/Parser/Json.php	96.77% <0.00%> (-0.11%)	18.00% <0.00%> (ø%)
lib/Property/Time.php	97.29% <0.00%> (-0.08%)	13.00% <0.00%> (ø%)
lib/Component.php	98.67% <0.00%> (-0.02%)	92.00% <0.00%> (ø%)
lib/FreeBusyGenerator.php	98.10% <0.00%> (-0.01%)	90.00% <0.00%> (ø%)
lib/Property/Text.php	99.12% <0.00%> (-0.01%)	40.00% <0.00%> (ø%)
lib/Parameter.php	99.20% <0.00%> (-0.01%)	81.00% <0.00%> (ø%)
lib/Property/UtcOffset.php	100.00% <0.00%> (ø)	3.00% <0.00%> (ø%)
lib/Recur/EventIterator.php	100.00% <0.00%> (ø)	46.00% <0.00%> (ø%)
... and 9 more

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[phil-davis]

All Travis CI phpunit results now have no warnings/errors.

[phil-davis]

These tests seem to get reused in sabre-io/dav. I guess this will need a vobject release so that the unit test change gets seen in the downstream repo?

[staabm]

LGTM - Thank you