Fix some warnings · reflex-frp/reflex@ef8dd61

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v3, haskell/actions/setup@v2, actions/cache@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Build Docs: src/Reflex/Class.hs#L762

In the use of type constructor or class ‘FunctorMaybe’

Build Docs: src/Reflex/Class.hs#L762

In the use of type constructor or class ‘FunctorMaybe’

Build Docs: src/Reflex/Dynamic.hs#L99

Module ‘Debug.Trace’ does not export ‘traceEventWith’

Build Docs: src/Reflex/Collection.hs#L39

The import of ‘Control.Monad.Identity’ is redundant

Build Docs: src/Reflex/PerformEvent/Class.hs#L21

The import of ‘Control.Monad.Fix’ is redundant

Build Docs: src/Reflex/TriggerEvent/Base.hs#L79

• Redundant constraint: Monad m

Build Docs: src/Reflex/PostBuild/Base.hs#L35

The import of ‘Control.Monad.Identity’ is redundant

Build Docs: src/Reflex/PerformEvent/Base.hs#L38

The import of ‘Control.Monad.Identity’ is redundant

Build Docs: src/Reflex/PerformEvent/Base.hs#L94

• Redundant constraint: PrimMonad (HostFrame t)

Build Docs: src/Reflex/PerformEvent/Base.hs#L105

• Redundant constraint: PrimMonad (HostFrame t)

Build: src/Reflex/Class.hs#L762

In the use of type constructor or class ‘FunctorMaybe’

Build: src/Reflex/Class.hs#L762

In the use of type constructor or class ‘FunctorMaybe’

Build: src/Reflex/Class.hs#L1687