MD History: update iron-list and dependencies for better scroll performance

third_party/polymer/v1_0/components-chromium/iron-scroll-target-behavior/bower.json

 {
   "name": "iron-scroll-target-behavior",
-  "version": "1.0.8",
+  "version": "1.1.0",
   "description": "Allows to define a scroller target",
   "private": true,
   "license": "http://polymer.github.io/LICENSE.txt",
   "main": "iron-scroll-target-behavior.html",
   "authors": [
     "The Polymer Authors"
   ],
   "keywords": [
     "web-components",
     "polymer",
     "scroll"
   ],
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/iron-scroll-target-behavior.git"
   },
   "homepage": "https://github.com/PolymerElements/iron-scroll-target-behavior",
   "ignore": [],
   "dependencies": {
     "polymer": "Polymer/polymer#^1.1.0"
   },
   "devDependencies": {
     "iron-component-page": "PolymerElements/iron-component-page#^1.0.0",
     "iron-test-helpers": "polymerelements/iron-test-helpers#^1.0.0",
     "web-component-tester": "^4.0.0",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
   }
 }