Update min SDK version to 2.18.0 (#1731)

Author: Anna Gringauze

dwds/CHANGELOG.md

@@ -11,6 +11,7 @@
 - Migrate `package:dwds` to null safety.
 - Make `ChromeProxyService.getStack` wait for the debugger to perform initial
   resume operation. This avoids race conditions on isolate start.
+- Update the min SDK constraint to 2.18.0.
 
 **Breaking changes**
 
@@ -42,7 +43,7 @@
 
 ## 14.0.1
 
-- Add `libraryFilters` optional parameter to the vm service implememtation of
+- Add `libraryFilters` optional parameter to the vm service implementation of
   `getSourceReport`.
 - Update temp variable detection heuristics so internal JS type objects do not
   show in the debugger.

dwds/pubspec.yaml

@@ -7,7 +7,7 @@ description: >-
 repository: https://github.com/dart-lang/webdev/tree/master/dwds
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=2.18.0 <3.0.0"
 
 dependencies:
   async: ^2.9.0

example/pubspec.yaml

@@ -4,7 +4,7 @@ description: A web app example for webdev CLI.
 publish_to: none
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=2.18.0 <3.0.0"
 
 dev_dependencies:
   build_runner: ^2.0.0

fixtures/_webdevSmoke/pubspec.yaml

@@ -12,7 +12,7 @@ description:
 # and build_web_compilers constraint should match those defined
 # in pubspec.dart.
 environment:
-  sdk: '>=2.17.0 <3.0.0'
+  sdk: '>=2.18.0 <3.0.0'
 
 dev_dependencies:
   build_runner: '>=1.6.2 <3.0.0'

fixtures/_webdevSoundSmoke/pubspec.yaml

@@ -2,7 +2,7 @@ name: _webdev_smoke
 description: A test fixture for webdev testing with sound support.
 
 environment:
-  sdk: '>=2.17.0 <3.0.0'
+  sdk: '>=2.18.0 <3.0.0'
 
 dev_dependencies:
   build_runner: '>=1.6.2 <3.0.0'

frontend_server_common/pubspec.yaml

@@ -3,7 +3,7 @@ publish_to: none
 description: >-
   Frontend server integration code to use for dwds tests. Mimics flutter code.
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=2.18.0 <3.0.0"
 
 dependencies:
   dwds:

webdev/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 2.7.11-dev
 
 - Remove no longer used `ExpressionCompilerService.handler`.
+- Update the min SDK constraint to 2.18.0.
 
 ## 2.7.10
 
@@ -43,7 +44,7 @@
 ## 2.7.7
 
 - Handle and log http request serving errors.
-- Update SDK contraint to `>=2.15.0 <3.0.0`.
+- Update SDK constraint to `>=2.15.0 <3.0.0`.
 
 ## 2.7.6
 

webdev/pubspec.yaml

@@ -9,7 +9,7 @@ description: >-
 repository: https://github.com/dart-lang/webdev/tree/master/webdev
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=2.18.0 <3.0.0"
 
 dependencies:
   args: ^2.3.1