test on oldest supported SDK (#48)

* update min sdk
* Fix references to dartlang.org

.travis.yml

@@ -2,9 +2,11 @@ language: dart
 
 dart:
   - dev
+  - 2.2.0
+
 dart_task:
   - test
-  - dartanalyzer
+  - dartanalyzer: --fatal-infos --fatal-warnings .
 
 matrix:
   include:

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 * Fixed issue where throwing `RpcException.methodNotFound` in an asynchronous
   fallback handler would not result in the next fallback being executed.
+* Updated minimum SDK to Dart `2.2.0`.
 
 ## 2.1.0
 

pubspec.yaml

@@ -5,7 +5,7 @@ description: >-
 homepage: https://github.com/dart-lang/json_rpc_2
 
 environment:
-  sdk: ">=2.0.0 <3.0.0"
+  sdk: ">=2.2.0 <3.0.0"
 
 dependencies:
   stack_trace: ^1.0.0

test/server/parameters_test.dart

@@ -18,7 +18,7 @@ void main() {
         'string': 'zap',
         'list': [1, 2, 3],
         'date-time': '1990-01-01 00:00:00.000',
-        'uri': 'http://dartlang.org',
+        'uri': 'https://dart.dev',
         'invalid-uri': 'http://[::1',
         'map': {'num': 4.2, 'bool': false}
       });
@@ -34,7 +34,7 @@ void main() {
             'string': 'zap',
             'list': [1, 2, 3],
             'date-time': '1990-01-01 00:00:00.000',
-            'uri': 'http://dartlang.org',
+            'uri': 'https://dart.dev',
             'invalid-uri': 'http://[::1',
             'map': {'num': 4.2, 'bool': false}
           }));
@@ -241,12 +241,12 @@ void main() {
     });
 
     test('[].asUri returns URI parameters', () {
-      expect(parameters['uri'].asUri, equals(Uri.parse('http://dartlang.org')));
+      expect(parameters['uri'].asUri, equals(Uri.parse('https://dart.dev')));
     });
 
     test('[].asUriOr returns URI parameters', () {
       expect(parameters['uri'].asUriOr(Uri.parse('http://google.com')),
-          equals(Uri.parse('http://dartlang.org')));
+          equals(Uri.parse('https://dart.dev')));
     });
 
     test('[].asUri fails for non-URI parameters', () {