fix Crystal nightly

test Crystal nightly and macOS

.github/workflows/crystal.yml

@@ -20,7 +20,12 @@ jobs:
   test:
     strategy:
       fail-fast: false
-    runs-on: ubuntu-latest
+      matrix:
+        include:
+          - {os: ubuntu-latest, crystal: latest}
+          - {os: ubuntu-latest, crystal: nightly}
+          - {os: macos-latest}
+    runs-on: ${{ matrix.os }}
     steps:
       - name: Install Crystal
         uses: crystal-lang/install-crystal@v1

src/mechanize/cookie.cr

@@ -11,7 +11,7 @@ class ::HTTP::Cookie
                  @expires : Time? = nil, @domain : String? = nil,
                  @secure : Bool = false, @http_only : Bool = false,
                  @samesite : SameSite? = nil, @extension : String? = nil,
-                 @origin : String? = nil)
+                 @origin : String? = nil, @creation_time = Time.utc)
     validate_name(name)
     @name = name
     validate_value(value)