Better emoji picker (#73)

Adds a better, custom, emoji picker.

Reviewed-on: #73

pubspec.lock

@@ -297,15 +297,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.0.8"
-  emoji_text_field:
-    dependency: "direct main"
-    description:
-      path: "."
-      ref: HEAD
-      resolved-ref: "5f7baaf8a6f059ec3ab8ff0f5d02339b00bf6997"
-      url: "https://github.com/Henry-Hiles/emoji_text_field"
-    source: git
-    version: "1.0.0"
   encrypt:
     dependency: transitive
     description:
@@ -903,6 +894,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.13.0"
+  material_emoji_picker:
+    dependency: "direct main"
+    description:
+      name: material_emoji_picker
+      sha256: "1547195a419134cf0b2396d119dc873589804f461424917b1b61a0966bfb7e5a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0+1"
   material_ui:
     dependency: "direct main"
     description: