deps: Upgrade packages to latest, namely http

This is the result of `flutter pub upgrade --major-versions`.

The changelog entry is pretty small:
  https://pub.dev/packages/http/changelog
Guess they just decided it was time to call it 1.0.

Author: gnprice

pubspec.lock

@@ -412,10 +412,10 @@ packages:
     dependency: "direct main"
     description:
       name: http
-      sha256: "5895291c13fa8a3bd82e76d5627f69e0d85ca6a30dcac95c4ea19a5d555879c2"
+      sha256: "4c3f04bfb64d3efd508d06b41b825542f08122d30bda4933fb95c069d22a4fa3"
       url: "https://pub.dev"
     source: hosted
-    version: "0.13.6"
+    version: "1.0.0"
   http_multi_server:
     dependency: transitive
     description:

pubspec.yaml

@@ -42,7 +42,7 @@ dependencies:
   cupertino_icons: ^1.0.2
 
   json_annotation: ^4.8.1
-  http: ^0.13.5
+  http: ^1.0.0
   html: ^0.15.1
   intl: ^0.18.0
   share_plus: ^7.0.0