Renamed io-classes:io-classes-mtl as io-classes:mtl

The trick was to use `cabal-version: 3.4`.

Author: coot

io-classes/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Revsion history of io-classes
 
+### 1.7.0.0
+
+### Breaking changes
+
+* Renamed `io-classes:io-classes-mtl` as `io-classes:mtl`.
+
 ### 1.6.0.0
 
 ### Breaking changes

io-classes/io-classes.cabal

@@ -186,8 +186,7 @@ library si-timers
   if flag(asserts)
      ghc-options:      -fno-ignore-asserts
 
--- https://github.com/haskell/cabal/issues/10277
-library io-classes-mtl
+library mtl
     import:           warnings
     visibility:       public
     exposed-modules:  Control.Monad.Class.Trans