[jnigen] Bump SDK constraint to 4.0.0 (https://github.com/dart-lang/jnigen/issues/190)

diff --git a/pkgs/jni/example/pubspec.yaml b/pkgs/jni/example/pubspec.yaml
index 1ff0ae2..70624e6 100644
--- a/pkgs/jni/example/pubspec.yaml
+++ b/pkgs/jni/example/pubspec.yaml
@@ -18,7 +18,7 @@
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.5 <3.0.0"
+  sdk: ">=2.17.5 <4.0.0"
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions
diff --git a/pkgs/jni/pubspec.yaml b/pkgs/jni/pubspec.yaml
index 57df539..40aa26c 100644
--- a/pkgs/jni/pubspec.yaml
+++ b/pkgs/jni/pubspec.yaml
@@ -4,7 +4,7 @@
 repository: https://github.com/dart-lang/jnigen/tree/main/jni
 
 environment:
-  sdk: ">=2.17.1 <3.0.0"
+  sdk: ">=2.17.1 <4.0.0"
   flutter: ">=2.11.0"
 
 dependencies:
diff --git a/pkgs/jni/third_party/ffigen_patch_jni/pubspec.yaml b/pkgs/jni/third_party/ffigen_patch_jni/pubspec.yaml
index ffe24d0..237c0fd 100644
--- a/pkgs/jni/third_party/ffigen_patch_jni/pubspec.yaml
+++ b/pkgs/jni/third_party/ffigen_patch_jni/pubspec.yaml
@@ -8,7 +8,7 @@
 repository: https://github.com/dart-lang/ffigen
 
 environment:
-  sdk: '>=2.17.0 <3.0.0'
+  sdk: '>=2.17.0 <4.0.0'
 
 dependencies:
   ffi: ^2.0.0
diff --git a/pkgs/jnigen/example/in_app_java/pubspec.yaml b/pkgs/jnigen/example/in_app_java/pubspec.yaml
index f2dcc7d..7ab467b 100644
--- a/pkgs/jnigen/example/in_app_java/pubspec.yaml
+++ b/pkgs/jnigen/example/in_app_java/pubspec.yaml
@@ -8,7 +8,7 @@
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.6 <3.0.0"
+  sdk: ">=2.17.6 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/pkgs/jnigen/example/kotlin_plugin/example/pubspec.yaml b/pkgs/jnigen/example/kotlin_plugin/example/pubspec.yaml
index 4292ba9..2da89b5 100644
--- a/pkgs/jnigen/example/kotlin_plugin/example/pubspec.yaml
+++ b/pkgs/jnigen/example/kotlin_plugin/example/pubspec.yaml
@@ -6,7 +6,7 @@
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.19.0-444.3.beta <3.0.0"
+  sdk: ">=2.19.0-444.3.beta <4.0.0"
 
 dependencies:
   flutter:
diff --git a/pkgs/jnigen/example/kotlin_plugin/pubspec.yaml b/pkgs/jnigen/example/kotlin_plugin/pubspec.yaml
index f6b5916..e054689 100644
--- a/pkgs/jnigen/example/kotlin_plugin/pubspec.yaml
+++ b/pkgs/jnigen/example/kotlin_plugin/pubspec.yaml
@@ -8,7 +8,7 @@
 publish_to: none
 
 environment:
-  sdk: '>=2.19.0-444.3.beta <3.0.0'
+  sdk: '>=2.19.0-444.3.beta <4.0.0'
   flutter: ">=1.17.0"
 
 dependencies:
diff --git a/pkgs/jnigen/example/notification_plugin/example/pubspec.yaml b/pkgs/jnigen/example/notification_plugin/example/pubspec.yaml
index 127c7dc..cbcaed9 100644
--- a/pkgs/jnigen/example/notification_plugin/example/pubspec.yaml
+++ b/pkgs/jnigen/example/notification_plugin/example/pubspec.yaml
@@ -20,7 +20,7 @@
 version: 1.0.0+1
 
 environment:
-  sdk: '>=2.17.6 <3.0.0'
+  sdk: '>=2.17.6 <4.0.0'
 
 dependencies:
   flutter:
diff --git a/pkgs/jnigen/example/notification_plugin/pubspec.yaml b/pkgs/jnigen/example/notification_plugin/pubspec.yaml
index f059a55..f2a6e1b 100644
--- a/pkgs/jnigen/example/notification_plugin/pubspec.yaml
+++ b/pkgs/jnigen/example/notification_plugin/pubspec.yaml
@@ -5,7 +5,7 @@
 homepage: https://github.com/dart-lang/jnigen
 
 environment:
-  sdk: '>=2.17.6 <3.0.0'
+  sdk: '>=2.17.6 <4.0.0'
   flutter: ">=2.11.0"
 
 dependencies:
diff --git a/pkgs/jnigen/example/pdfbox_plugin/dart_example/pubspec.yaml b/pkgs/jnigen/example/pdfbox_plugin/dart_example/pubspec.yaml
index 235ccbd..ed37559 100644
--- a/pkgs/jnigen/example/pdfbox_plugin/dart_example/pubspec.yaml
+++ b/pkgs/jnigen/example/pdfbox_plugin/dart_example/pubspec.yaml
@@ -5,7 +5,7 @@
 # homepage: https://www.example.com
 
 environment:
-  sdk: '>=2.17.6 <3.0.0'
+  sdk: '>=2.17.6 <4.0.0'
 
 dependencies:
   path: ^1.8.0
diff --git a/pkgs/jnigen/example/pdfbox_plugin/example/pubspec.yaml b/pkgs/jnigen/example/pdfbox_plugin/example/pubspec.yaml
index 67c80b7..6c96298 100644
--- a/pkgs/jnigen/example/pdfbox_plugin/example/pubspec.yaml
+++ b/pkgs/jnigen/example/pdfbox_plugin/example/pubspec.yaml
@@ -18,7 +18,7 @@
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.6 <3.0.0"
+  sdk: ">=2.17.6 <4.0.0"
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions
diff --git a/pkgs/jnigen/example/pdfbox_plugin/pubspec.yaml b/pkgs/jnigen/example/pdfbox_plugin/pubspec.yaml
index 82c8715..f77b031 100644
--- a/pkgs/jnigen/example/pdfbox_plugin/pubspec.yaml
+++ b/pkgs/jnigen/example/pdfbox_plugin/pubspec.yaml
@@ -6,7 +6,7 @@
 homepage: https://github.com/dart-lang/jnigen
 
 environment:
-  sdk: ">=2.17.6 <3.0.0"
+  sdk: ">=2.17.6 <4.0.0"
   #flutter: ">=2.11.0"
 
 dependencies:
diff --git a/pkgs/jnigen/pubspec.yaml b/pkgs/jnigen/pubspec.yaml
index b491b18..b944f6b 100644
--- a/pkgs/jnigen/pubspec.yaml
+++ b/pkgs/jnigen/pubspec.yaml
@@ -8,7 +8,7 @@
 repository: https://github.com/dart-lang/jnigen/tree/main/jnigen
 
 environment:
-  sdk: '>=2.17.0 <3.0.0'
+  sdk: '>=2.17.0 <4.0.0'
 
 dependencies:
   json_annotation: ^4.8.0