Make run() public for fuse-pipe multi-reader pattern

fuse-pipe uses Session::run() for its multi-reader FUSE implementation.
The method was made pub(crate) upstream but we need it public in our fork.

Author: ejc3

src/session.rs

@@ -191,7 +191,7 @@ impl<FS: Filesystem> Session<FS> {
     /// may run concurrent by spawning threads.
     /// # Errors
     /// Returns any final error when the session comes to an end.
-    pub(crate) fn run(mut self) -> io::Result<()> {
+    pub fn run(mut self) -> io::Result<()> {
         // Buffer for receiving requests from the kernel. Only one is allocated and
         // it is reused immediately after dispatching to conserve memory and allocations.
         let mut buffer = vec![0; BUFFER_SIZE];