THRIFT-5158 Update Rust generator and Rust lib,test,tutorial to only support 2018 edition
Client: rs
Patch: Allen George

This closes #2078
diff --git a/lib/rs/src/transport/framed.rs b/lib/rs/src/transport/framed.rs
index 98ad1bb..c30ccd9 100644
--- a/lib/rs/src/transport/framed.rs
+++ b/lib/rs/src/transport/framed.rs
@@ -239,7 +239,7 @@
 #[cfg(test)]
 mod tests {
     use super::*;
-    use transport::mem::TBufferChannel;
+    use crate::transport::mem::TBufferChannel;
 
     // FIXME: test a forced reserve