Allow analyzer 10

example/main.dart

@@ -77,6 +77,7 @@ class _FontConfig {
       {required this.family,
       required this.url,
       this.testString = _successMessage,
+      // ignore: unused_element_parameter
       this.expectLoad = true});
 }
 

example/unload.dart

@@ -91,6 +91,7 @@ class _FontConfig {
       {required this.family,
       required this.url,
       this.group = FontFaceObserver.defaultGroup,
+      // ignore: unused_element_parameter
       this.key = ''});
 }
 

pubspec.yaml

@@ -8,7 +8,7 @@ environment:
 
 dev_dependencies:
   build_runner: ^2.0.0
-  build_test: ^2.0.0
+  build_test: '>=2.0.0 <4.0.0'
   build_web_compilers: '>=3.0.0 <5.0.0'
   test: ^1.16.8
   workiva_analysis_options: ^1.0.1