Generator: run pub upgrade --tighten with Dart SDK 3.4.0

Increase minimum required dependencies to those resolvable with
Dart SDK 3.4.0.

Author: greenrobot-team

generator/pubspec.yaml

@@ -11,21 +11,20 @@ environment:
 dependencies:
   objectbox: 4.1.0
   analyzer: '>=6.5.0 <8.0.0' # dart_style 2.3.7 requires 6.5.0
-  build: ^2.0.0
-  collection: ^1.15.0
+  build: ^2.4.1
+  collection: ^1.19.1
   dart_style: '>=2.3.7 <4.0.0' # require 2.3.7 for languageVersion in DartFormatter constructor
-  glob: ^2.0.0
-  path: ^1.8.0
-  source_gen: '>=1.2.7 <3.0.0'
-  pubspec_parse: ^1.0.0
-  yaml: ^3.0.0
-  http: '>=0.13.5 <2.0.0'
-  pointycastle: '>=3.7.3 <5.0.0' # 3.7.4 requires Dart 3, but still supporting 2.18
+  glob: ^2.1.3
+  path: ^1.9.1
+  source_gen: ">=1.5.0 <3.0.0"
+  pubspec_parse: ^1.4.0
+  yaml: ^3.1.3
+  http: ^1.3.0
+  pointycastle: ^4.0.0
 
 dev_dependencies:
-  test: ^1.16.5
-  # lints 2.1.0+ requires Dart 3, but CI still tests with Dart 2, but also need 3.0.0+ to match pana
-  lints: '>=2.0.1 <4.0.0'
-  pub_semver: ^2.1.3
-  package_config: ^2.1.0
-  build_test:
+  test: ^1.25.8
+  lints: ^3.0.0
+  pub_semver: ^2.2.0
+  package_config: ^2.2.0
+  build_test: ^2.2.2