title: Flutter Dependency Error (flutter_svg: ^0.19.2+1)
body: <p>When I try to add flutter_svg dependency to add SVG format picture in my project it throws me an error like that:
  <a href="https://i.stack.imgur.com/W5jjo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/W5jjo.png" alt="enter image description here" /></a></p>
  <pre><code>/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.19.2+1/lib/src/picture_provider.dart:57:59: Error: No named parameter with the name 'nullOk'.
          context != null ? Localizations.localeOf(context, nullOk: true) : null,
                                                            ^^^^^^
  /C:/src/flutter/packages/flutter/lib/src/widgets/localizations.dart:413:17: Context: Found this candidate, but the arguments don't match.
    static Locale localeOf(BuildContext context) {
  </code></pre>
  <p>I'm using flutter (Channel master, 1.26.0-18.0.pre.193). and flutter_svg: ^0.19.2+1</p>
  <p>I've also with a lower version of this dependency, but still the same error.</p>