Add .circleci/config.yml (#3)

* Add .circleci/config.yml

pubspec.lock

@@ -168,7 +168,7 @@ packages:
       name: dropdown_search
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.0.0"
+    version: "5.0.3"
   equatable:
     dependency: transitive
     description:
@@ -290,19 +290,19 @@ packages:
     source: hosted
     version: "0.6.4"
   json_annotation:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.6.0"
+    version: "4.7.0"
   json_serializable:
     dependency: "direct dev"
     description:
       name: json_serializable
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.3.2"
+    version: "6.4.1"
   lazy_evaluation:
     dependency: "direct main"
     description:
@@ -400,7 +400,7 @@ packages:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.4"
+    version: "2.0.5"
   path_provider_windows:
     dependency: transitive
     description:
@@ -421,7 +421,7 @@ packages:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.2"
+    version: "2.1.3"
   pool:
     dependency: transitive
     description:
@@ -498,7 +498,7 @@ packages:
       name: shared_preferences_android
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.12"
+    version: "2.0.13"
   shared_preferences_ios:
     dependency: transitive
     description:
@@ -547,7 +547,7 @@ packages:
       name: shelf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.2"
+    version: "1.4.0"
   shelf_web_socket:
     dependency: transitive
     description:
@@ -566,7 +566,7 @@ packages:
       name: source_gen
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.3"
+    version: "1.2.5"
   source_helper:
     dependency: transitive
     description:
@@ -594,7 +594,7 @@ packages:
       name: stacked
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.15"
+    version: "3.0.0"
   stacked_core:
     dependency: transitive
     description:
@@ -608,7 +608,7 @@ packages:
       name: stacked_services
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.26"
+    version: "0.9.5"
   stream_channel:
     dependency: transitive
     description: