Update dependency cosmiconfig to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cosmiconfig	dependencies	major	^5.2.0 -> ^6.0.0

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Release Notes

davidtheclark/cosmiconfig

v6.0.0

Compare Source

• Breaking change: The package now has named exports. See examples below.

• Breaking change: Separate async and sync APIs, accessible from different named exports. If you used explorer.searchSync() or explorer.loadSync(), you'll now create a sync explorer with cosmiconfigSync(), then use explorerSync.search() and explorerSync.load().

  // OLD: cosmiconfig v5
  import cosmiconfig from 'cosmiconfig';
  
  const explorer = cosmiconfig('example');
  const searchAsyncResult = await explorer.search();
  const loadAsyncResult = await explorer.load('./file/to/load');
  const searchSyncResult = explorer.searchSync();
  const loadSyncResult = explorer.loadSync('./file/to/load');
  
  // NEW: cosmiconfig v6
  import { cosmiconfig, cosmiconfigSync } from 'cosmiconfig';
  
  const explorer = cosmiconfig('example');
  const searchAsyncResult = await explorer.search();
  const loadAsyncResult = await explorer.load('./file/to/load');
  
  const explorerSync = cosmiconfigSync('example');
  const searchSyncResult = explorerSync.search();
  const loadSyncResult = explorerSync.load('./file/to/load');

• Breaking change: Remove support for Node 4 and 6. Requires Node 8+.

• Breaking change: Use npm package yaml to parse YAML instead of npm package js-yaml.

• Breaking change: Remove cosmiconfig.loaders and add named export defaultLoaders that exports the default loaders used for each extension.

  import { defaultLoaders } from 'cosmiconfig';
  
  console.log(Object.entries(defaultLoaders))
  // [
  //   [ '.js', [Function: loadJs] ],
  //   [ '.json', [Function: loadJson] ],
  //   [ '.yaml', [Function: loadYaml] ],
  //   [ '.yml', [Function: loadYaml] ],
  //   [ 'noExt', [Function: loadYaml] ]
  // ]

• Migrate from Flowtype to Typescript.

• Lazy load all default loaders.

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