Updating dependencies
This release is a small maintenance update that updates dependencies and cleans up some lines of code.
- MD5 is removed in favor of the crypto module
- webp-bin is replaced by the better maintained cwebp-bin module
- mkdirp and mime are updated to their most recent versions
Further the default value for the cache directory (options.cacheDir) is changed from __dirname + '/../../webp-cache' to path.join(process.cwd(), 'webp-cache').