Update Erlang CI images

 * Use latest patch levels for 24 and 25.
 * Add 26 to the list.

In Erlang 26 TLS `verify` option switched the default value from `verify_none`
to `verify_peer` [1]. So had to explictly set it in the test client.

[1] https://www.erlang.org/blog/otp-26-highlights/#ssl-safer-defaults

.github/workflows/ci.yml

@@ -15,8 +15,9 @@ jobs:
         os:
           - ubuntu-latest
         otp:
-          - "25.3.0.0"
-          - "24.3.4.10"
+          - "26.0.2.0"
+          - "25.3.2.3"
+          - "24.3.4.13"
           - "23.3.4.18"
           - "22.3.4.26"
           - "21.3.8.24"

test/mochiweb_test_util.erl

@@ -31,7 +31,7 @@ with_server(Transport, ServerFun, ClientFun) ->
     Res.
 
 ssl_client_opts(Opts) ->
-  [{server_name_indication, disable} | Opts].
+  [{server_name_indication, disable}, {verify, verify_none} | Opts].
 
 sock_fun(Transport, Port) ->
     Opts = [binary, {active, false}, {packet, http}],