Update pubspec.yaml (#2321)

Author: ntkme

pkg/sass_api/pubspec.yaml

@@ -13,7 +13,7 @@ dependencies:
   sass: 1.78.0
 
 dev_dependencies:
-  dartdoc: ">=6.0.0 <9.0.0"
+  dartdoc: ^8.0.14
 
 dependency_overrides:
   sass: { path: ../.. }

pubspec.yaml

@@ -17,7 +17,7 @@ dependencies:
   cli_pkg: ^2.8.0
   cli_repl: ^0.2.1
   collection: ^1.16.0
-  http: "^1.1.0"
+  http: ^1.1.0
   js: ^0.6.3
   meta: ^1.3.0
   native_synchronization: ^0.3.0
@@ -38,15 +38,15 @@ dependencies:
   watcher: ^1.0.0
 
 dev_dependencies:
-  analyzer: ">=5.13.0 <7.0.0"
+  analyzer: ^6.8.0
   archive: ^3.1.2
   crypto: ^3.0.0
   dart_style: ^2.0.0
-  dartdoc: ">=6.0.0 <9.0.0"
+  dartdoc: ^8.0.14
   grinder: ^0.9.0
   node_preamble: ^2.0.2
-  lints: ">=2.0.0 <5.0.0"
-  protoc_plugin: ">=20.0.0 <22.0.0"
+  lints: ^4.0.0
+  protoc_plugin: ^21.1.2
   pub_api_client: ^2.1.1
   pubspec_parse: ^1.3.0
   test: ^1.16.7