Update to uswds v2

[humancompanion-usds]

Updates US Forms System to USWDS v2.

Types of changes

Updates to the scss and React components.

Checklist:

• I've reviewed the guidelines for contributing to this repository.
• I've checked style and lint with npm run lint.
• I built the production version with npm run build.
• I added tests to verify a bug fix or new functionality.
• All tests pass locally with npm test.
• My change requires a change to the documentation, and I've updated the documentation accordingly.

Working on tests and looking into documentation changes, if any.

[dmethvin-gov]

@humancompanion-usds Sorry about the delay. The build is failing because there is an issue with the dependencies, not with your changes. (Or at least, whatever problems your changes introduce aren't being encountered yet!) I need to fix them (which I've done locally) and publish a new release of both the library and the starter app. You'd think that would be simple but the build process is rather manual and it has bit-rotted some as well. I also have to find all the correct authentication stuff so that I can publish. Both of those are more complicated than they have to be because they have things so locked down.

In the meantime you might be able to get unblocked by making the following changes to the package.json in your starter app repo. I at least got it to build with this.

index 39cb8f3..18bcfde 100644
--- a/package.json
+++ b/package.json
@@ -27,10 +27,10 @@
     "css-loader": "^2.1.1",
     "eslint": "^4.19.1",
     "eslint-config-airbnb": "^15.1.0",
-    "eslint-plugin-import": "^2.16.0",
+    "eslint-plugin-import": "^2.22.0",
     "eslint-plugin-jsx-a11y": "^5.1.1",
     "eslint-plugin-no-unsafe-innerhtml": "^1.0.14",
-    "eslint-plugin-react": "^7.12.4",
+    "eslint-plugin-react": "^7.20.6",
     "eslint-plugin-scanjs-rules": "^0.1.4",
     "eslint-stats": "^1.0.0",
     "mocha": "^5.2.0",
@@ -40,17 +40,21 @@
     "svg-url-loader": "^2.3.2",
     "uglifyjs-webpack-plugin": "^2.1.2",
     "url-loader": "^1.0.1",
-    "webpack": "^4.29.6",
-    "webpack-bundle-analyzer": "^3.3.2",
-    "webpack-cli": "^3.2.3",
-    "webpack-dev-server": "^3.2.1",
+    "webpack": "^4.44.1",
+    "webpack-bundle-analyzer": "^3.8.0",
+    "webpack-cli": "^3.3.12",
+    "webpack-dev-server": "^3.11.0",
     "webpack-merge": "^4.2.1"
   },
   "dependencies": {
+    "history": "3",
+    "react-redux": "4.4.8",
+    "redux": "^3.5.2",
+    "react-router": "^3.2.6",
     "prop-types": "^15.7.2",
     "react": "^15.6.2",
     "react-dom": "^15.6.2",
-    "us-forms-system": "^1.1.0",
-    "uswds": "^1.6.3"
+    "us-forms-system": "file:../us-forms-system",
+    "uswds": "^2.8.1"
   }