Bump fable from 5.5.0 to 5.6.0

[dependabot]

Updated fable from 5.5.0 to 5.6.0.

Release notes

Sourced from fable's releases.

5.6.0

🚀 Features

• (all) Allow [<Emit>] on StringEnum cases (#​4711) (0b1f61ee)
• (js/ts) Optimize printfn with constant string to console.log (#​4718) (2d6d083a)
• (js/ts) Add Path.Combine support (b1b1e273)
• (js/ts) Add System.IO.Path and System.IO.File API support (ec99fac5)
• (js/ts/python) Warn on duplicate attached member names (#​4715) (fd06aa64)
• (js/ts/python) Add Environment and Console.Error support (6e082f95)
• (py) Add Path.Combine support (4c901c65)
• (python) Add Directory.Exists, Directory.CreateDirectory (f4b4eabc)
• (ts) [<Pojo>] interfaces extend parent [<Pojo>] type (#​4717) (4f4243cd)

🐞 Bug Fixes

• Generate an error on erased union case typed as obj (#​4710) (bf2134d5)
• (all) Include return type in overload suffix for op_Implicit/op_Explicit (#​4712) (a6846010)
• (js/ts) DateTime.ToString() and %A are now consistent across all DateTimeKind values (#​4714) (de98b0e4)
• (python) Accept allowAccessToPrivateRepresentation in FSharpType.IsUnion/IsRecord/GetUnionCases (#​4722) (7f915f1d)
• (ts) Strip byref annotation from compiler-generated copy-update locals (#​4716) (1e072ed2)

⚡ Performance Improvements

• Split Fable.Transforms into per-target projects for faster incremental builds (#​4720) (260c962f)

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Commits viewable in compare view.

[tiksn]

@dependabot rebase