next.js, material-ui: window is not defined

### Are you submitting a **bug report** or a **feature request**?

Bug Report

### What is the current behavior?

final-form-material-ui will not allow my next.js project to load.

### What is the expected behavior?

My project should load and the behavior in the examples should function normally

### Sandbox Link
N/A

### What's your environment?
MacOS X, node 11.8.0

```
"dependencies": {
"@material-ui/core": "3.7.1",
"@material-ui/icons": "3.0.2",
"@zeit/next-bundle-analyzer": "^0.1.2",
"@zeit/next-source-maps": "^0.0.3",
"axios": "^0.18.0",
"dotenv": "^7.0.0",
"final-form": "^4.12.0",
"final-form-material-ui": "^0.3.0",
"jss": "9.8.7",
"next": "latest",
"next-compose-plugins": "^2.1.1",
"next-images": "^1.1.1",
"next-redux-saga": "^4.0.1",
"next-redux-wrapper": "latest",
"prop-types": "^15.7.2",
"react": "16.7.0",
"react-dom": "16.7.0",
"react-final-form": "^4.1.0",
"react-jss": "8.6.1",
"react-redux": "6.0.0",
"redux": "4.0.1",
"redux-logger": "^3.0.6",
"redux-saga": "^1.0.2",
"redux-thunk": "2.3.0",
"universal-cookie-express": "^3.1.0",
"uuid": "^3.3.2",
"webpack": "^4.30.0"
}
```

### Other information

```
ReferenceError: window is not defined
at Object. (/Users/michael/owlbrite/ge/applications/web/node_modules/final-form-material-ui/dist/final-form-material-ui.min.js:1:1452)
at Module._compile (internal/modules/cjs/loader.js:736:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:747:10)
at Module.load (internal/modules/cjs/loader.js:628:32)
at tryModuleLoad (internal/modules/cjs/loader.js:568:12)
at Function.Module._load (internal/modules/cjs/loader.js:560:3)
at Module.require (internal/modules/cjs/loader.js:665:17)
at require (internal/modules/cjs/helpers.js:20:18)
at Object.final-form-material-ui (/Users/michael/owlbrite/ge/applications/web/.next/server/static/development/pages/register.js:690:18)

```

and

```
TypeError: Cannot read property 'theme' of undefined
at _Document.render (/Users/michael/owlbrite/ge/applications/web/.next/server/static/development/pages/_document.js:220:28)
at processChild (/Users/michael/owlbrite/ge/applications/web/node_modules/react-dom/cjs/react-dom-server.node.development.js:2863:18)
at resolve (/Users/michael/owlbrite/ge/applications/web/node_modules/react-dom/cjs/react-dom-server.node.development.js:2716:5)
at ReactDOMServerRenderer.render (/Users/michael/owlbrite/ge/applications/web/node_modules/react-dom/cjs/react-dom-server.node.development.js:3100:22)
at ReactDOMServerRenderer.read (/Users/michael/owlbrite/ge/applications/web/node_modules/react-dom/cjs/react-dom-server.node.development.js:3059:29)
at renderToStaticMarkup (/Users/michael/owlbrite/ge/applications/web/node_modules/react-dom/cjs/react-dom-server.node.development.js:3541:27)
at _callee3$ (/Users/michael/owlbrite/ge/applications/web/node_modules/next/dist/server/render.js:393:100)
at tryCatch (/Users/michael/owlbrite/ge/applications/web/node_modules/regenerator-runtime/runtime.js:62:40)
at Generator.invoke [as _invoke] (/Users/michael/owlbrite/ge/applications/web/node_modules/regenerator-runtime/runtime.js:288:22)
at Generator.prototype.(anonymous function) [as next] (/Users/michael/owlbrite/ge/applications/web/node_modules/regenerator-runtime/runtime.js:114:21)
at asyncGeneratorStep (/Users/michael/owlbrite/ge/applications/web/node_modules/@babel/runtime-corejs2/helpers/asyncToGenerator.js:5:24)
at _next (/Users/michael/owlbrite/ge/applications/web/node_modules/@babel/runtime-corejs2/helpers/asyncToGenerator.js:27:9)
at processTicksAndRejections (internal/process/next_tick.js:81:5)
```