Switch CI to use Coq 8.12.

.gitlab-ci.yml

@@ -32,7 +32,7 @@ variables:
 build-coq.8.11.2:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.11.2   cerberus git git+https://github.com/rlepigre/cerberus.git#da87de09974dd4063c0b50fea7f23420374dd169"
+    OPAM_PINS: "coq version 8.12.0   cerberus git git+https://github.com/rlepigre/cerberus.git#da87de09974dd4063c0b50fea7f23420374dd169"
     DENY_WARNINGS: "1"
   tags:
   - fp-timing
@@ -40,7 +40,7 @@ build-coq.8.11.2:
 build-iris.dev:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.11.dev   coq-stdpp.dev git git+https://gitlab.mpi-sws.org/iris/stdpp.git#$STDPP_REV   coq-iris.dev git git+https://gitlab.mpi-sws.org/iris/iris.git#$IRIS_REV  cerberus git git+https://github.com/rlepigre/cerberus.git#da87de09974dd4063c0b50fea7f23420374dd169"
+    OPAM_PINS: "coq version 8.12.dev   coq-stdpp.dev git git+https://gitlab.mpi-sws.org/iris/stdpp.git#$STDPP_REV   coq-iris.dev git git+https://gitlab.mpi-sws.org/iris/iris.git#$IRIS_REV  cerberus git git+https://github.com/rlepigre/cerberus.git#da87de09974dd4063c0b50fea7f23420374dd169"
   except:
   only:
   - triggers