Tests compile on Windows

Just shut off a bunch of test sections. Probably most can remain as long
as some of them get broken out into separate unix-only test sections.

src/icon.rs

@@ -305,7 +305,7 @@ impl Icons {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test,unix))]
 mod test {
     use super::{Icons, Theme, ICON_SPACE};
     use crate::meta::{FileType, Name, Permissions};

src/meta/date.rs

@@ -55,7 +55,7 @@ impl Date {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, unix))]
 mod test {
     use super::Date;
     use crate::color::{Colors, Theme};

src/meta/filetype.rs

@@ -70,7 +70,7 @@ impl FileType {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, unix))]
 mod test {
     use super::FileType;
     use crate::color::{Colors, Theme};

src/meta/name.rs

@@ -90,7 +90,7 @@ impl PartialEq for Name {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, unix))]
 mod test {
     use super::Name;
     use crate::color::{self, Colors};