fix: ignore broken symlinks (#832)

* fix: ignore broken symlinks

* fix ci

* maybe

* excluding 1.4 macos

(cherry picked from commit fcb7966)

* fix

* Update .github/workflows/ci.yml

Co-authored-by: Sebastian Pfitzner <pfitzseb@gmail.com>

---------

Co-authored-by: Sebastian Pfitzner <pfitzseb@gmail.com>
Co-authored-by: Dominique Luna <dluna132@gmail.com>

src/JuliaFormatter.jl

@@ -442,6 +442,7 @@ function format(path::AbstractString, options::Configuration)
         formatted = Threads.Atomic{Bool}(true)
         Threads.@threads for subpath in readdir(path)
             subpath = joinpath(path, subpath)
+            !ispath(subpath) && continue
             is_formatted = format(subpath, options)
             Threads.atomic_and!(formatted, is_formatted)
         end