replace-v1 flag breaks migration

[okovpashko]

Hello.
Recently I tried to migrate our app to framework v2 and get an error when tried to use --replace-v1 flag.
Here's the full output:

sandro@Sandros-MacBook $ zat migrate --replace-v1
App will be migrated from: /Users/sandro/Work/Projects/devmate/devmate-zendesk-app
App will be migrated to: /Users/sandro/Work/Projects/devmate/devmate-zendesk-app/v2/
? Are you sure you want to replace v1 files? Yes
v1 App will be backed up to: /Users/sandro/Work/Projects/devmate/devmate-zendesk-app/v1/
Warning: `parser` with value "postcss" is deprecated. Use "css", "less" or "scss" instead.
 [==================[22[1m=--] 12/13 steps completemv: cannot move to self: /Users/sandro/Work/Projects/devmate/devmate-zendesk-app/v1
 [====================[22[1m=] 13/13 steps complete
Installing dependencies
yarn install v1.3.2
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
warning "karma-webpack > webpack-dev-middleware@1.8.4" has incorrect peer dependency "webpack@1 || ^2.1.0-beta".
[4/4] Building fresh packages...
Done in 45.27s.
Building v2 app
yarn run v1.3.2
$ webpack -p
Hash: a55139b8c2439aa4b3cf
Version: webpack 3.5.1
Time: 2710ms
     Asset       Size  Chunks                    Chunk Names
   main.js     315 kB       0  [emitted]  [big]  app
  main.css    0 bytes       0  [emitted]         app
index.html  745 bytes          [emitted]         
  [85] (webpack)/buildin/global.js 509 bytes {0} [built]
 [114] multi babel-polyfill ./src/javascripts/index.js ./src/stylesheets/app.scss 52 bytes {0} [built]
 [298] ./src/javascripts/index.js 1.11 kB {0} [built] [failed] [1 error]
 [299] ./src/stylesheets/app.scss 41 bytes {0} [built]
 [300] ./node_modules/css-loader?sourceMap&root=/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/dist/assets!./node_modules/sass-loader/lib/loader.js?sourceMap!./src/stylesheets/app.scss 248 bytes [built]
    + 299 hidden modules

ERROR in ./src/javascripts/index.js
Module build failed: Error: No ESLint configuration found.
    at Config.getLocalConfigHierarchy (/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/node_modules/eslint/lib/config.js:256:39)
    at Config.getConfigHierarchy (/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/node_modules/eslint/lib/config.js:182:43)
    at Config.getConfigVector (/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/node_modules/eslint/lib/config.js:287:21)
    at Config.getConfig (/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/node_modules/eslint/lib/config.js:330:29)
    at processText (/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/node_modules/eslint/lib/cli-engine.js:162:33)
    at CLIEngine.executeOnText (/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/node_modules/eslint/lib/cli-engine.js:668:26)
    at lint (/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/node_modules/eslint-loader/index.js:218:17)
    at Object.module.exports (/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/node_modules/eslint-loader/index.js:213:21)
 @ multi babel-polyfill ./src/javascripts/index.js ./src/stylesheets/app.scss
Child html-webpack-plugin for "index.html":
     1 asset
       [4] ./node_modules/handlebars-loader!./lib/templates/layout.hdbs 2.27 kB {0} [built]
        + 7 hidden modules
Child extract-text-webpack-plugin node_modules/extract-text-webpack-plugin/dist node_modules/css-loader/index.js?sourceMap&root=/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/dist/assets!node_modules/sass-loader/lib/loader.js?sourceMap!src/stylesheets/app.scss:
       [0] ./node_modules/css-loader?sourceMap&root=/Users/sandro/Work/Projects/devmate/devmate-zendesk-app/dist/assets!./node_modules/sass-loader/lib/loader.js?sourceMap!./src/stylesheets/app.scss 248 bytes {0} [built]
        + 1 hidden module
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
undefined
 [====================[22[1m=] 13/13 steps completeError: Promise rejected with value: 'error Command failed with exit code 2.\n'
    at /Users/sandro/.nvm/versions/node/v8.9.1/lib/node_modules/zendesk_app_migrator/node_modules/loud-rejection/index.js:27:12
    at Array.forEach (<anonymous>)
    at EventEmitter.<anonymous> (/Users/sandro/.nvm/versions/node/v8.9.1/lib/node_modules/zendesk_app_migrator/node_modules/loud-rejection/index.js:23:24)
    at emitTwo (events.js:126:13)
    at EventEmitter.emit (events.js:214:7)
    at emit (/Users/sandro/.nvm/versions/node/v8.9.1/lib/node_modules/zendesk_app_migrator/node_modules/signal-exit/index.js:77:11)
    at processEmit [as emit] (/Users/sandro/.nvm/versions/node/v8.9.1/lib/node_modules/zendesk_app_migrator/node_modules/signal-exit/index.js:150:5)

As you can see there's an error Module build failed: Error: No ESLint configuration found.
I noticed that none of "dot" files (.babelrc, .eslintrc, .node-version, .travis.yml) were copied to root directory of the project.

I think I've found the reason for this error and can submit a PR with the fix.