add invoice pdf

pubspec.lock

@@ -28,7 +28,7 @@ packages:
       name: cached_network_image
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.2+1"
+    version: "2.3.3"
   camera:
     dependency: "direct main"
     description:
@@ -176,6 +176,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.3"
   file:
     dependency: transitive
     description:
@@ -246,13 +253,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.1.6"
-  fixnum:
-    dependency: transitive
-    description:
-      name: fixnum
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.10.11"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -266,12 +266,12 @@ packages:
     source: hosted
     version: "0.5.0"
   flutter_cache_manager:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: flutter_cache_manager
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.4.2"
+    version: "2.0.0"
   flutter_datetime_picker:
     dependency: "direct main"
     description:
@@ -454,7 +454,7 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.14"
+    version: "1.6.22"
   path_provider_linux:
     dependency: transitive
     description:
@@ -476,6 +476,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.3"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.4+1"
   pedantic:
     dependency: transitive
     description:
@@ -546,13 +553,6 @@ packages:
       relative: true
     source: path
     version: "0.0.1"
-  protobuf:
-    dependency: transitive
-    description:
-      name: protobuf
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.1"
   provider:
     dependency: "direct main"
     description:
@@ -768,6 +768,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.8"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.3"
   xdg_directories:
     dependency: transitive
     description: