Don't pass --fatal-infos to dart analyze in validation

lib/src/validator/analyze.dart

@@ -22,12 +22,7 @@ class AnalyzeValidator extends Validator {
         .where(dirExists);
     final result = await runProcess(
       Platform.resolvedExecutable,
-      [
-        'analyze',
-        '--fatal-infos',
-        ...dirsToAnalyze,
-        p.join(entrypoint.rootDir, 'pubspec.yaml')
-      ],
+      ['analyze', ...dirsToAnalyze, p.join(entrypoint.rootDir, 'pubspec.yaml')],
     );
     if (result.exitCode != 0) {
       final limitedOutput = limitLength(result.stdout.join('\n'), 1000);

test/validator/analyze_test.dart

@@ -34,7 +34,7 @@ void main() {
   });
 
   test(
-      'follows analysis_options.yaml and should warn if package contains errors in pubspec.yaml',
+      'follows analysis_options.yaml and should not warn if package contains only infos',
       () async {
     await d.dir(appPath, [
       d.libPubspec(
@@ -53,6 +53,32 @@ linter:
 ''')
     ]).create();
 
+    await expectValidation();
+  });
+
+  test(
+      'follows analysis_options.yaml and should warn if package contains warnings in pubspec.yaml',
+      () async {
+    await d.dir(appPath, [
+      d.libPubspec(
+        'test_pkg', '1.0.0',
+        sdk: '^3.0.0',
+        // Using http where https is recommended.
+        extras: {'repository': 'http://repo.org/'},
+      ),
+      d.file('LICENSE', 'Eh, do what you want.'),
+      d.file('README.md', "This package isn't real."),
+      d.file('CHANGELOG.md', '# 1.0.0\nFirst version\n'),
+      d.file('analysis_options.yaml', '''
+linter:
+  rules:
+    - secure_pubspec_urls
+analyzer:
+  errors:
+    secure_pubspec_urls: warning
+''')
+    ]).create();
+
     await expectValidation(
       error: allOf([
         contains(