Fix missing Sys. in detectwsl

Author: MichaelHatherly

src/helpers.jl

@@ -6,7 +6,7 @@ else
     # https://github.com/JuliaLang/julia/pull/57069
     function detectwsl()
         # We use the same approach as canonical/snapd do to detect WSL
-        islinux() && (
+        Sys.islinux() && (
             isfile("/proc/sys/fs/binfmt_misc/WSLInterop")
             || isdir("/run/WSL")
         )

test/utilities_test.jl

@@ -8,4 +8,6 @@
     @test PkgAuthentication.assert_dict_keys(Dict("bar" => 0), "foo", "bar"; msg="") === nothing
     @test_throws ErrorException PkgAuthentication.assert_dict_keys(Dict(), "foo", "bar"; msg="")
     @test_throws ErrorException PkgAuthentication.assert_dict_keys(Dict("baz" => 0), "foo", "bar"; msg="")
+
+    @test PkgAuthentication.detectwsl() isa Bool
 end