Support brick/money 0.14

[robertvansteen]

Moves brick/money from ^0.10.1 to ^0.14.1, which is what a consumer on a current framework needs.

brick removed two APIs this package relied on:

• Currency::is() is gone in favour of isEqualTo().
• Money comparisons no longer accept floats, so the float member is dropped from the four endpoint comparison signatures. A float was never a safe way to ask a monetary question; callers pass Money, BigNumber, int, or a numeric string.

That signature change is why the release is 0.2.0.

-        Assert::true($left->getCurrency()->is($this->right->getCurrency()), ...);
+        Assert::true($left->getCurrency()->isEqualTo($this->right->getCurrency()), ...);

Two fixes fall out of the newer toolchain:

• leftEndpoint / rightEndpoint always exist, because the trailing group closingSymbol is always matched, so the ?? null on each was dead. Unmatched groups arrive as '' and the emptiness checks below already handle that.
• isEqualTo compared three components but no test varied a single endpoint, leaving a surviving mutant that weakened the endpoint conjunction to a disjunction. Two assertions now pin intervals that share one endpoint and differ in the other.

PHPUnit is capped below 12.5.12, which rejects the -d --min-coverage form phpunit-coverage-tools documents for its threshold.

Verified: PHPStan clean, 62 tests, 100% coverage, MSI 100%.