Prepare to publish analyzer 1.2.0 and _fe_analyzer_shared 18.0.0.

Change-Id: If31ece2507cfb012d5742aa147df2ca781b4f712
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/191303
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Reviewed-by: Janice Collins <jcollins@google.com>
Reviewed-by: Samuel Rawlins <srawlins@google.com>

pkg/_fe_analyzer_shared/pubspec.yaml

@@ -1,5 +1,5 @@
 name: _fe_analyzer_shared
-version: 17.0.0
+version: 18.0.0
 description: Logic that is shared between the front_end and analyzer packages.
 homepage: https://github.com/dart-lang/sdk/tree/master/pkg/_fe_analyzer_shared
 

pkg/analyzer/CHANGELOG.md

@@ -1,6 +1,8 @@
-## 1.2.0-dev
+## 1.2.0
 * Deprecated all setters in API of AST. Use `parseString()` instead.
 * `AnalysisSession.getErrors()` does not return `null`, check its `state`.
+* Support for `aliasElement` and `aliasArguments` for aliases of
+  `InterfaceType`s and `TypeParameterType`s.
 
 ## 1.1.0
 * Deprecated `TypeProvider.futureType2()`, `iterableType2()`, etc.

pkg/analyzer/pubspec.yaml

@@ -1,5 +1,5 @@
 name: analyzer
-version: 1.2.0-dev
+version: 1.2.0
 description: This package provides a library that performs static analysis of Dart code.
 homepage: https://github.com/dart-lang/sdk/tree/master/pkg/analyzer
 
@@ -7,7 +7,7 @@ environment:
   sdk: '>=2.12.0-0 <3.0.0'
 
 dependencies:
-  _fe_analyzer_shared: ^17.0.0
+  _fe_analyzer_shared: ^18.0.0
   cli_util: ^0.3.0
   collection: ^1.15.0
   convert: ^3.0.0