Require Psalm 7 and declare event-loop I/O capabilities - #134

Process completed with exit code 2.

src/EventLoop/Internal/DriverSuspension.php:44:27: PropertyTypeCoercion: $this->fiberRef expects 'WeakReference<Fiber>|null', parent type 'WeakReference<object>|null' provided (see https://psalm.dev/198)

src/EventLoop/Driver/UvDriver.php:176:21: MixedAssignment: Unable to determine the type that $event is being assigned to (see https://psalm.dev/032)

src/EventLoop/Driver/UvDriver.php:174:21: MixedAssignment: Unable to determine the type that $event is being assigned to (see https://psalm.dev/032)

src/EventLoop/Driver/UvDriver.php:64:78: MixedOperand: Left operand cannot be mixed (see https://psalm.dev/059)

src/EventLoop/Driver/UvDriver.php:64:66: MixedOperand: Right operand cannot be mixed (see https://psalm.dev/059)

src/EventLoop/Driver/UvDriver.php:56:32: MixedArgument: Argument 1 of uv_poll_start cannot be mixed, expecting resource (see https://psalm.dev/030)

src/EventLoop/Driver/StreamSelectDriver.php:262:32: MixedArgumentTypeCoercion: Argument 1 of set_error_handler expects callable[impure](int, string, string=, int=, array<array-key, mixed>=):bool|null, but parent type Closure[impure] provided (see https://psalm.dev/194)

examples/fiber-local-manual.php:47:14: MixedOperand: Left operand cannot be mixed (see https://psalm.dev/059)

examples/fiber-local-automatic.php:37:14: MixedOperand: Left operand cannot be mixed (see https://psalm.dev/059)

examples/benchmark-timers-delay.php:13:29: MixedArgumentTypeCoercion: Argument 2 of Revolt\EventLoop::delay expects Closure[impure](string):void, but parent type Closure[impure] provided (see https://psalm.dev/194)

examples/benchmark-ticks-delay.php:13:26: MixedArgumentTypeCoercion: Argument 1 of Revolt\EventLoop::defer expects Closure[impure](string):void, but parent type Closure[impure] provided (see https://psalm.dev/194)

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