Anons79 Mini Shell

CHANGELOG
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7.1
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 * Add `DatePoint::getMicrosecond()` and `DatePoint::setMicrosecond()`

6.4
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 * Add `DatePoint`: an immutable DateTime implementation with stricter error handling and return types
 * Throw `DateMalformedStringException`/`DateInvalidTimeZoneException` when appropriate
 * Add `$modifier` argument to the `now()` helper

6.3
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 * Add `ClockAwareTrait` to help write time-sensitive classes
 * Add `Clock` class and `now()` function

6.2
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 * Add the component