fix: Enable dynamicImport plugin to support import() syntax (#903)

Fixes #902

Author: tmcw

__tests__/fixture/es6-import.input.js

@@ -2,6 +2,8 @@ import hasEx6 from './es6-ext';
 import multiply from './simple.input.js';
 import * as foo from 'some-other-module';
 
+import('./simple.input.js').then(() => {});
+
 /**
  * This function returns the number one.
  * @returns {Number} numberone

src/parsers/parse_to_ast.js

@@ -6,20 +6,18 @@ var opts = {
  allowImportExportEverywhere: true,
  sourceType: 'module',
  plugins: [
- 'jsx',
- 'flow',
- 'asyncFunctions',
+ 'asyncGenerators',
  'classConstructorCall',
- 'doExpressions',
- 'trailingFunctionCommas',
- 'objectRestSpread',
- 'decorators',
  'classProperties',
+ 'decorators',
+ 'doExpressions',
  'exportExtensions',
- 'exponentiationOperator',
- 'asyncGenerators',
+ 'flow',
  'functionBind',
- 'functionSent'
+ 'functionSent',
+ 'jsx',
+ 'objectRestSpread',
+ 'dynamicImport'
  ]
 };