Update README for v1.4 release

Author: tzcnt

README.md

@@ -66,8 +66,7 @@ TooManyCooks will work out of the box as a header-only library without any confi
 However, some performance tuning options are available. See the documentation section [Build-Time Options](https://fleetcode.com/oss/tmc/docs/latest/build_flags.html) for more info.
 
 ### Roadmap
-- v1.4: awaitable traits / concepts, zero-copy channel, awaitable result streaming
-- Beyond: See the [issues tagged "enhancement"](https://github.com/tzcnt/TooManyCooks/issues?q=is%3Aissue%20state%3Aopen%20label%3Aenhancement) for future planned work. Please leave a :thumbsup: on any issues that are important to you. I will use this as a way to gauge community interest on what should be developed next.
+See the [issues tagged "enhancement"](https://github.com/tzcnt/TooManyCooks/issues?q=is%3Aissue%20state%3Aopen%20label%3Aenhancement) for future planned work. Please leave a :thumbsup: on any issues that are important to you. I will use this as a way to gauge community interest on what should be developed next.
 
 ### Supported Compilers
 All 3 major compilers are fully supported, but Clang is the recommended compiler, as it has the best coroutine codegen and the most functional HALO implementation.