Update app lock file

app/pubspec.lock

@@ -43,6 +43,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.15.0"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.0"
+  csslib:
+    dependency: transitive
+    description:
+      name: csslib
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.17.0"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -84,7 +98,7 @@ packages:
       name: filesystem_picker
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.0-nullsafety.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -142,6 +156,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  html:
+    dependency: transitive
+    description:
+      name: html
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.15.0"
   http:
     dependency: transitive
     description:
@@ -162,7 +183,14 @@ packages:
       name: image_picker
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.7.2+1"
+    version: "0.7.3"
+  image_picker_for_web:
+    dependency: transitive
+    description:
+      name: image_picker_for_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
   image_picker_platform_interface:
     dependency: transitive
     description:
@@ -314,7 +342,7 @@ packages:
       name: string_validator
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.0-nullsafety.0"
+    version: "0.3.0"
   term_glyph:
     dependency: transitive
     description:
@@ -343,6 +371,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.3.0"
+  universal_html:
+    dependency: transitive
+    description:
+      name: universal_html
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.4"
+  universal_io:
+    dependency: transitive
+    description:
+      name: universal_io
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
   url_launcher:
     dependency: transitive
     description: