Lands beta branch into master for 2.5 (#895)

add_to_app/books/flutter_module_books/pubspec.lock

@@ -28,7 +28,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.2"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -36,27 +36,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
-  build:
-    dependency: transitive
-    description:
-      name: build
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-  built_collection:
-    dependency: transitive
-    description:
-      name: built_collection
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "5.1.1"
-  built_value:
-    dependency: transitive
-    description:
-      name: built_value
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "8.1.2"
   characters:
     dependency: transitive
     description:
@@ -85,13 +64,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
-  code_builder:
-    dependency: transitive
-    description:
-      name: code_builder
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "4.1.0"
   collection:
     dependency: transitive
     description:
@@ -113,13 +85,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.1"
-  dart_style:
-    dependency: transitive
-    description:
-      name: dart_style
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.3"
   fake_async:
     dependency: transitive
     description:
@@ -134,13 +99,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.2"
-  fixnum:
-    dependency: transitive
-    description:
-      name: fixnum
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -152,7 +110,7 @@ packages:
       name: flutter_lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "1.0.4"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -172,20 +130,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.1"
-  logging:
-    dependency: transitive
-    description:
-      name: logging
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.1"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.11"
+    version: "0.12.10"
   meta:
     dependency: transitive
     description:
@@ -193,13 +144,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.7.0"
-  mockito:
-    dependency: "direct dev"
-    description:
-      name: mockito
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "5.0.15"
   package_config:
     dependency: transitive
     description:
@@ -227,7 +171,7 @@ packages:
       name: pigeon
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.0.2"
   pub_semver:
     dependency: transitive
     description:
@@ -240,13 +184,6 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.99"
-  source_gen:
-    dependency: transitive
-    description:
-      name: source_gen
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.3"
   source_span:
     dependency: transitive
     description:
@@ -288,7 +225,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.3"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description: