Fix up mentions of v8.11

README.md

@@ -2,11 +2,11 @@
 
 This "Iris plugin" implements the `string_to_ident` hook of the Iris proof mode
 using Ltac2, providing support for Gallina names in Iris intro patterns on Coq
-8.12 and later. Use the `v8.11` branch for a version that works with Coq 8.11.
+8.11 and later.
 
 ## Installation
 
-You can install the Coq 8.11 version of this "plugin" via opam. First add the
+You can install a Coq 8.11 version of this "plugin" via opam. First add the
 Iris opam repository:
 
 ```sh
@@ -34,6 +34,6 @@ Proof.
 Qed.
 ```
 
-## Acknowledgements
+## Acknowledgments
 
 This implementation strategy was suggested by Robbert Krebbers.

opam

@@ -13,7 +13,7 @@ This package implements string_to_ident in Ltac2, enabling support for Gallina n
 """
 
 depends: [
-  "coq" {>= "8.12"}
+  "coq" {>= "8.11"}
   "coq-iris" {>= "dev.2020-04-07.0.86b62616" | (>= "3.3.0" & < "4.0") | = "dev"}
 ]