Fix travis

.travis.sh

@@ -32,13 +32,11 @@ edo ./ghcup -v rm -f 8.2.2
 
 # install default GHC
 edo ./ghcup -v install
+edo ./ghcup -v set
 
 # install latest GHC
 edo ./ghcup -v install latest
 
-# FIXME: this might break from time to time depending on recommended GHC
-edo ./ghcup -v set 8.4.4
-
 export PATH="$HOME/.cabal/bin:$HOME/.ghcup/bin:$HOME/.local/bin:$PATH"
 edo mkdir -p "$HOME"/.local/bin