Update actix-cors requirement from 0.3.0 to 0.4.1 (#778)

Updates the requirements on [actix-cors](https://github.com/actix/actix-extras) to permit the latest version.
- [Release notes](https://github.com/actix/actix-extras/releases)
- [Commits](https://github.com/actix/actix-extras/compare/cors-v0.3.0...cors-v0.4.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

examples/actix_subscriptions/Cargo.toml

@@ -7,7 +7,7 @@ publish = false
 
 [dependencies]
 actix-web = "3.0.0"
-actix-cors = "0.3.0"
+actix-cors = "0.4.1"
 
 futures = "0.3.5"
 tokio = { version = "0.2", features = ["rt-core", "macros"] }

juniper_actix/Cargo.toml

@@ -29,7 +29,7 @@ juniper_graphql_ws = { path = "../juniper_graphql_ws", optional = true }
 
 [dev-dependencies]
 actix-rt = "1.1.1"
-actix-cors = "0.3.0"
+actix-cors = "0.4.1"
 actix-identity = "0.3.0"
 
 bytes = "0.5.6"