Support specifying the theme with a string to support JSON and YAML configuration files

[pklaschka]

As requested by @fussel178:

require is not possible in .yml and similar files.
Can you use a string like fliegdoc-html-parser instead and require it in the configuration builder?
You can also disable support for .yml and similar files.
See: https://www.npmjs.com/package/cosmiconfig#searchplaces

Originally posted by @fussel178 in #8 (comment)

[fussel178]

Okay, so you need in

fliegdoc/bin/fliegdoc.js

Line 19 in ebd3331

const { config, filepath } = cosmiconfigSync('fliegdoc').search();

something like:

const moduleName = 'fliegdoc';
const { config, filepath } = cosmiconfigSync(moduleName, {
	searchPlaces: [
		`.${moduleName}rc.js`,
		`.${moduleName}rc.cjs`,
		`${moduleName}.config.js`,
		`${moduleName}.config.cjs`
	]
}).search();

Originally posted by @fussel178 in #8 (comment)