Bump Iris.

opam

@@ -9,6 +9,6 @@ build: [make "-j%{jobs}%"]
 install: [make "install"]
 remove: ["rm" "-rf" "%{lib}%/coq/user-contrib/reloc"]
 depends: [
-  "coq-iris" { (= "dev.2019-03-26.0.0495f119") | (= "dev") }
+  "coq-iris" { (= "dev.2019-04-07.4.4760ad33") | (= "dev") }
   "coq-autosubst" { = "dev.coq86" }
 ]

theories/typing/types.v

@@ -68,7 +68,7 @@ Notation "∀: τ" :=
 Notation "∃: τ" :=
   (TExists τ%ty)
   (at level 100, τ at level 200) : FType_scope.
-Notation "'ref' τ" := (Tref τ%ty) (at level 30, right associativity): FType_scope.
+Notation "'ref' τ" := (Tref τ%ty) (at level 10): FType_scope.
 
 (** * Typing judgements *)
 Reserved Notation "Γ ⊢ₜ e : τ" (at level 74, e, τ at next level).