[ffigen] Use `package:ffi` 1.2.1 (#371)

pkgs/ffigen/example/c_json/pubspec.yaml

diff --git a/pkgs/ffigen/example/c_json/pubspec.yaml b/pkgs/ffigen/example/c_json/pubspec.yaml
index 4a29269..fc21ca9 100644
--- a/pkgs/ffigen/example/c_json/pubspec.yaml
+++ b/pkgs/ffigen/example/c_json/pubspec.yaml
@@ -8,7 +8,7 @@
   sdk: '>=2.17.0 <3.0.0'
 
 dependencies:
-  ffi: ^1.1.2
+  ffi: ^1.2.1
   path: ^1.8.0
 
 dev_dependencies:

pkgs/ffigen/example/libclang-example/pubspec.yaml

diff --git a/pkgs/ffigen/example/libclang-example/pubspec.yaml b/pkgs/ffigen/example/libclang-example/pubspec.yaml
index 692c26c..cd3a1c3 100644
--- a/pkgs/ffigen/example/libclang-example/pubspec.yaml
+++ b/pkgs/ffigen/example/libclang-example/pubspec.yaml
@@ -8,7 +8,7 @@
   sdk: '>=2.17.0 <3.0.0'
 
 dependencies:
-  ffi: ^1.1.2
+  ffi: ^1.2.1
 dev_dependencies:
   ffigen:
     path: '../../'

pkgs/ffigen/example/simple/pubspec.yaml

diff --git a/pkgs/ffigen/example/simple/pubspec.yaml b/pkgs/ffigen/example/simple/pubspec.yaml
index f55489d..8c45afc 100644
--- a/pkgs/ffigen/example/simple/pubspec.yaml
+++ b/pkgs/ffigen/example/simple/pubspec.yaml
@@ -8,7 +8,7 @@
   sdk: '>=2.17.0 <3.0.0'
 
 dependencies:
-  ffi: ^1.1.2
+  ffi: ^1.2.1
 dev_dependencies:
   ffigen:
     path: '../../'

pkgs/ffigen/pubspec.yaml

diff --git a/pkgs/ffigen/pubspec.yaml b/pkgs/ffigen/pubspec.yaml
index 09dd6fb..c054c50 100644
--- a/pkgs/ffigen/pubspec.yaml
+++ b/pkgs/ffigen/pubspec.yaml
@@ -11,7 +11,7 @@
   sdk: '>=2.17.0 <3.0.0'
 
 dependencies:
-  ffi: ^1.1.2
+  ffi: ^1.2.1
   yaml: ^3.0.0
   path: ^1.8.0
   quiver: ^3.0.0