address a few analysis warnings

diff --git a/.gitignore b/.gitignore
index 3e09de1..5617d32 100644
--- a/.gitignore
+++ b/.gitignore

@@ -7,6 +7,7 @@
 
 .packages
 .pub
+.dart_tool/
 packages
 pubspec.lock
 deps/sdk

diff --git a/angular_analyzer_plugin/analysis_options.yaml b/angular_analyzer_plugin/analysis_options.yaml
index 613e528..b306593 100644
--- a/angular_analyzer_plugin/analysis_options.yaml
+++ b/angular_analyzer_plugin/analysis_options.yaml

@@ -1,8 +1,8 @@
 analyzer:
-  strong-mode: true
   exclude:
+    # TODO(devoncarew): We should remove this blanket exclusion as it could hide
+    # other issues.
     - lib/src/summary/format.dart
-    - lib/src/angular_html_parser.dart
 
 linter:
   rules:

diff --git a/angular_analyzer_plugin/lib/ast.dart b/angular_analyzer_plugin/lib/ast.dart
index 5f51014..9498409 100644
--- a/angular_analyzer_plugin/lib/ast.dart
+++ b/angular_analyzer_plugin/lib/ast.dart

@@ -358,18 +358,17 @@
   void accept(AngularAstVisitor visitor) => visitor.visitTextInfo(this);
 }
 
-/// A wrapper for a given HTML document or
-/// dart-angular inline HTML template.
+/// A wrapper for a given HTML document or dart-angular inline HTML template.
 class DocumentInfo extends ElementInfo {
   factory DocumentInfo() = DocumentInfo._;
 
   DocumentInfo._()
       : super(
           '',
-          new SourceRange(0, 0),
-          new SourceRange(0, 0),
-          new SourceRange(0, 0),
-          new SourceRange(0, 0),
+          const SourceRange(0, 0),
+          const SourceRange(0, 0),
+          const SourceRange(0, 0),
+          const SourceRange(0, 0),
           [],
           null,
           null,

diff --git a/angular_analyzer_plugin/lib/src/completion.dart b/angular_analyzer_plugin/lib/src/completion.dart
index 9379659..875c30d 100644
--- a/angular_analyzer_plugin/lib/src/completion.dart
+++ b/angular_analyzer_plugin/lib/src/completion.dart

@@ -472,7 +472,7 @@
       ..parameterTypes =
           element.parameters.map((param) => param.type.toString()).toList()
       ..requiredParameterCount =
-          element.parameters.where((param) => param.isRequired).length
+          element.parameters.where((param) => param.hasRequired).length
       ..hasNamedParameters =
           element.parameters.any((param) => param.name != null);
   }

diff --git a/angular_analyzer_plugin/test/abstract_angular.dart b/angular_analyzer_plugin/test/abstract_angular.dart
index b12171c..dd49aa7 100644
--- a/angular_analyzer_plugin/test/abstract_angular.dart
+++ b/angular_analyzer_plugin/test/abstract_angular.dart

@@ -158,7 +158,7 @@
         new FileContentOverlay(),
         contextRoot,
         sf,
-        new AnalysisOptionsImpl()..strongMode = true);
+        new AnalysisOptionsImpl());
     angularDriver = new AngularDriver(
         resourceProvider,
         new MockNotificationManager(),

diff --git a/angular_analyzer_plugin/test/angular_driver_test.dart b/angular_analyzer_plugin/test/angular_driver_test.dart
index 628dbe1..02da663 100644
--- a/angular_analyzer_plugin/test/angular_driver_test.dart
+++ b/angular_analyzer_plugin/test/angular_driver_test.dart

@@ -19,6 +19,8 @@
 
 import 'abstract_angular.dart';
 
+// ignore_for_file: deprecated_member_use
+
 void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AngularParseHtmlTest);

diff --git a/angular_analyzer_plugin/test/element_assert.dart b/angular_analyzer_plugin/test/element_assert.dart
index f773c2c..1c42873 100644
--- a/angular_analyzer_plugin/test/element_assert.dart
+++ b/angular_analyzer_plugin/test/element_assert.dart

@@ -5,6 +5,8 @@
 import 'package:angular_analyzer_plugin/src/selector.dart';
 import 'package:test/test.dart';
 
+// ignore_for_file: deprecated_member_use
+
 class AngularElementAssert extends _AbstractElementAssert {
   final AngularElement element;