drop support for Coq 8.9

.gitlab-ci.yml

@@ -52,11 +52,6 @@ build-coq.8.10.2:
   variables:
     OPAM_PINS: "coq version 8.10.2"
 
-build-coq.8.9.1:
-  <<: *template
-  variables:
-    OPAM_PINS: "coq version 8.9.1"
-
 # Nightly job with a known-to-work Coq version
 # (so failures must be caused by std++)
 build-stdpp.dev-coq.8.11.2:

README.md

@@ -18,11 +18,13 @@ definitions and some derived forms is available in
 
 This version is known to compile with:
 
- - Coq 8.9.1 / 8.10.2 / 8.11.2 / 8.12.0
+ - Coq 8.10.2 / 8.11.2 / 8.12.0
  - A development version of [std++](https://gitlab.mpi-sws.org/iris/stdpp)
 
 If you need to work with Coq 8.7 or Coq 8.8, please check out the
 [iris-3.2 branch](https://gitlab.mpi-sws.org/iris/iris/tree/iris-3.2).
+For Coq 8.9, you can use the
+[iris-3.3 branch](https://gitlab.mpi-sws.org/iris/iris/tree/iris-3.3).
 
 ### Working *with* Iris
 

opam

@@ -10,7 +10,7 @@ dev-repo: "git+https://gitlab.mpi-sws.org/iris/iris.git"
 synopsis: "Iris is a Higher-Order Concurrent Separation Logic Framework with support for interactive proofs"
 
 depends: [
-  "coq" { (>= "8.9.1" & < "8.13~") | (= "dev") }
+  "coq" { (>= "8.10.2" & < "8.13~") | (= "dev") }
   "coq-stdpp" { (= "dev.2020-08-07.0.67db2f24") | (= "dev") }
 ]