cirrus: two workers: one with 4.11 using 12.1, one with 4.10 using 13.0

Author: hannesm

Diff for: .cirrus.yml

@@ -1,14 +1,23 @@
-freebsd_instance:
-  image_family: freebsd-12-1
-
-freebsd_task:
-  env:
-    matrix:
-      - OCAML_VERSION: 4.10.1
-      - OCAML_VERSION: 4.11.1
+pkg_install_task_template: &PKG_INSTALL_TASK_TEMPLATE
   pkg_install_script: pkg install -y ocaml-opam gmp gmake pkgconf bash
-  ocaml_script: opam init -a --comp=$OCAML_VERSION
+
+task:
+  << : *PKG_INSTALL_TASK_TEMPLATE
+  ocaml_script: opam init -a --comp=4.11.1
   dependencies_script: eval `opam env` && opam install -y --deps-only .
   build_script: eval `opam env` && dune build @install
   test_script: eval `opam env` && opam install -y -t --deps-only . && dune build @runtest
   test_mirage_script: eval `opam env` && opam install -y solo5-bindings-hvt zarith-freestanding opam-depext && opam pin add -y . && ./.test-mirage.sh
+  name: FreeBSD 12.1
+  freebsd_instance:
+    image_family: freebsd-12-1
+
+task:
+  << : *PKG_INSTALL_TASK_TEMPLATE
+  ocaml_script: opam init -a --comp=4.10.2
+  dependencies_script: eval `opam env` && opam pin add -n mirage-crypto.dev . && opam pin add -n mirage-crypto-rng.dev . && opam pin add -n mirage-crypto-pk.dev . && opam pin add -y mirage-crypto-ec.dev . && opam install -t --deps-only mirage-crypto mirage-crypto-rng mirage-crypto-pk mirage-crypto-ec
+  build_script: eval `opam env` && opam exec -- dune build -p mirage-crypto,mirage-crypto-rng,mirage-crypto-pk,mirage-crypto-ec
+  test_script: eval `opam env` && opam exec -- dune runtest -p mirage-crypto,mirage-crypto-rng,mirage-crypto-pk,mirage-crypto-ec
+  name: FreeBSD 13
+  freebsd_instance:
+    image_family: freebsd-13-0-snap