Drop support Coq 8.18.

.gitlab-ci.yml

@@ -81,14 +81,6 @@ build-coq.8.19.1:
     OPAM_PINS: "coq version 8.19.1"
     DENY_WARNINGS: "1"
 
-# The oldest version runs in MRs, without name mangling.
-build-coq.8.18.0:
-  <<: *template
-  <<: *branches_and_mr
-  variables:
-    OPAM_PINS: "coq version 8.18.0"
-    DENY_WARNINGS: "1"
-
 trigger-stdpp.dev:
   <<: *template
   variables:

CHANGELOG.md

@@ -5,6 +5,8 @@ lemma.
 
 ## Iris master
 
+Iris master supports Coq 8.19 and 8.20. Coq 8.18 is no longer supported.
+
 **Changes in `algebra`:**
 
 * Add lemmas `big_opS_gset_to_gmap` and `big_opS_gset_to_gmap_L`, which rewrite

README.md

@@ -30,7 +30,7 @@ Importing Iris has some side effects as the library sets some global options.
 
 This version is known to compile with:
 
- - Coq 8.18.0 / 8.19.1 / 8.20.0
+ - Coq 8.19.1 / 8.20.0
  - A development version of [std++](https://gitlab.mpi-sws.org/iris/stdpp)
 
 Generally we always aim to support the last two stable Coq releases. Support for