Type_utils: make type expansion recursive
Type_utils: make type expansion recursive

chriskonstad/merlin,haselwarter/merlin,chambart/merlin,neojski/merlin,chriskonstad/merlin,ocaml/merlin,haselwarter/merlin,neojski/merlin,rgrinberg/merlin,fxfactorial/merlin,chambart/merlin,ocaml/merlin,haselwarter/merlin,dra27/merlin,the-lambda-church/merlin,rgrinberg/merlin,ocaml/merlin,rgrinberg/merlin,the-lambda-church/merlin,fxfactorial/merlin,fxfactorial/merlin,dra27/merlin,haselwarter/merlin,the-lambda-church/merlin,dra27/merlin,rgrinberg/merlin,ocaml/merlin,chambart/merlin,fxfactorial/merlin,neojski/merlin,neojski/merlin,chambart/merlin,dra27/merlin