ci update (#329)

* ci update

motivation: 5.6 is out

changes:
* use release version of 5.6
* add docker setup for 5.7 (using nightly for now)

* Update to new alloc counts

Co-authored-by: Cory Benfield <lukasa@apple.com>

Author: tomerd

docker/docker-compose.2004.56.yaml

@@ -6,8 +6,8 @@ services:
     image: swift-nio-http2:20.04-5.6
     build:
       args:
-        base_image: "swiftlang/swift:nightly-5.6-focal"
         ubuntu_version: "focal"
+        swift_version: "5.6"
         h2spec_version: "2.2.1"
 
   unit-tests:

docker/docker-compose.2004.57.yaml

@@ -0,0 +1,40 @@
+version: "3"
+
+services:
+
+  runtime-setup:
+    image: swift-nio-http2:20.04-5.7
+    build:
+      args:
+        base_image: "swiftlang/swift:nightly-main-focal"
+        h2spec_version: "2.2.1"
+
+  unit-tests:
+    image: swift-nio-http2:20.04-5.7
+
+  integration-tests:
+    image: swift-nio-http2:20.04-5.7
+
+  performance-test:
+    image: swift-nio-http2:20.04-5.7
+
+  h2spec:
+    image: swift-nio-http2:20.04-5.7
+
+  test:
+    image: swift-nio-http2:20.04-5.7
+    environment:
+      - MAX_ALLOCS_ALLOWED_1k_requests_interleaved=43200
+      - MAX_ALLOCS_ALLOWED_1k_requests_noninterleaved=42100
+      - MAX_ALLOCS_ALLOWED_client_server_h1_request_response=303050
+      - MAX_ALLOCS_ALLOWED_client_server_request_response=269050
+      - MAX_ALLOCS_ALLOWED_create_client_stream_channel=41050
+      - MAX_ALLOCS_ALLOWED_get_100000_headers_canonical_form=200050
+      - MAX_ALLOCS_ALLOWED_get_100000_headers_canonical_form_trimming_whitespace=200050
+      - MAX_ALLOCS_ALLOWED_get_100000_headers_canonical_form_trimming_whitespace_from_long_string=300050
+      - MAX_ALLOCS_ALLOWED_get_100000_headers_canonical_form_trimming_whitespace_from_short_string=200050
+      - MAX_ALLOCS_ALLOWED_hpack_decoding=5050
+      - MAX_ALLOCS_ALLOWED_stream_teardown_100_concurrent=293150
+
+  shell:
+    image: swift-nio-http2:20.04-5.7

docker/docker-compose.2004.main.yaml

@@ -7,7 +7,6 @@ services:
     build:
       args:
         base_image: "swiftlang/swift:nightly-main-focal"
-        ubuntu_version: "focal"
         h2spec_version: "2.2.1"
 
   unit-tests: