bump Iris, fix for prettify

opam

@@ -9,5 +9,5 @@ build: [make "-j%{jobs}%"]
 install: [make "install"]
 remove: [ "sh" "-c" "rm -rf '%{lib}%/coq/user-contrib/igps" ]
 depends: [
-  "coq-iris" { (= "branch.gen_proofmode.2018-07-03.0.4c3f5b17") | (= "dev") }
+  "coq-iris" { (= "branch.gen_proofmode.2018-07-04.2.34f64c8d") | (= "dev") }
 ]

theories/wp_tactics.v

@@ -22,7 +22,7 @@ Lemma tac_wp_value `{ghosts.foundationG Σ} Δ E Φ e v :
   envs_entails Δ (Φ v) → envs_entails Δ (WP e @ E {{ Φ }}).
 Proof. rewrite envs_entails_eq=> ? ->. by apply wp_value. Qed.
 
-Ltac wp_value_head := eapply tac_wp_value; [apply _|lazy beta].
+Ltac wp_value_head := eapply tac_wp_value; [apply _|reduction.pm_prettify].
 
 Tactic Notation "wp_pure" open_constr(efoc) :=
   iStartProof;

theories/wp_tactics_vProp.v

@@ -32,7 +32,7 @@ Lemma tac_wp_value `{foundationG Σ} Δ E Φ e v :
   envs_entails Δ (Φ v) → envs_entails Δ (WP e @ E {{ Φ }}).
 Proof. rewrite envs_entails_eq=> <- ->. now apply: wp_value'. Qed.
 
-Ltac wp_value_head := eapply tac_wp_value; [apply _|lazy beta].
+Ltac wp_value_head := eapply tac_wp_value; [apply _|reduction.pm_prettify].
 
 Tactic Notation "wp_pure" open_constr(efoc) :=
   iStartProof;