bump Iris; fix for big-op move

opam

@@ -6,5 +6,5 @@ install: [make "install"]
 remove: ["rm" "-rf" "'%{lib}%/coq/user-contrib/fri"]
 depends: [
   "coq" { (>= "8.7.2") | (= "dev") }
-  "coq-iris"  { (= "branch.gen_proofmode.2018-05-24.0.3bed085d") | (= "dev") }
+  "coq-iris"  { (= "branch.gen_proofmode.2018-05-29.6.4417e093") | (= "dev") }
 ]

theories/chan2heap/simple_reln.v

@@ -204,7 +204,7 @@ Section lr.
     rewrite /expr_equiv in pf. 
     specialize (pf ∅). rewrite /subst2typ fmap_empty in pf.
     efeed pose proof pf as pf'; eauto; try done.
-    rewrite bi.big_sepM_empty right_id in pf' *.
+    rewrite big_sepM_empty right_id in pf' *.
     intros ->; auto. 
   Qed.
 
@@ -472,13 +472,13 @@ Tactic Notation "refine_unbind" constr(K) :=
       ⊣⊢ Φ s1 ★ Φ s2 ★ ([∗ map] z↦P ∈ S, Φ P)%I.
   Proof.
     intros Hneq Hl1 Hl2.
-    rewrite bi.big_sepM_insert; last first.
+    rewrite big_sepM_insert; last first.
     - rewrite lookup_insert_ne; auto.
       * move:Hl1. rewrite /subst2typ lookup_fmap. 
         case_eq (S !! x).
         ** intros s Heq. rewrite Heq. inversion 1.
         ** intros s Heq. auto.
-    - rewrite bi.big_sepM_insert; last first.
+    - rewrite big_sepM_insert; last first.
       * move:Hl2. rewrite /subst2typ lookup_fmap. 
         case_eq (S !! y).
         ** intros s Heq. rewrite Heq. inversion 1.