remove support for running dart code in the browser (#3592) (7a3bd55)
BREAKING CHANGES
server: Deprecated require('karma').server.start() and require('karma').Server.start() variants were removed from the public API. Instead use canonical form:
const { Server } = require('karma');
const server = new Server();
server.start();
cli: Karma is more strict and will error out if unknown option or argument is passed to CLI.
Using Karma to run Dart code in the browser is no longer supported. Use your favorite Dart-to-JS compiler instead.
dart file type has been removed without a replacement.
customFileHandlers DI token has been removed. Use middleware to achieve similar functionality.
customScriptTypes DI token has been removed. It had no effect, so no replacement is provided.
deps: Some projects have socket.io tests that are version sensitive.
