message: feat(core): extended available ContentType values
diff: export enum ContentType {
  + APPLICATION = 'application/*',
  APPLICATION_JSON = 'application/json',
  + APPLICATION_JAVASCRIPT = 'application/javascript',
  + APPLICATION_ECMASCRIPT = 'application/ecmascript',
  + APPLICATION_OCTET_STREAM = 'application/octet-stream',
  + TEXT_PLAIN = 'text/plain',
  + TEXT_HTML = 'text/html',
  + TEXT_CSS = 'text/css',
  + IMAGE_JPEG = 'image/jpeg',
  + IMAGE_PNG = 'image/png',
  + IMAGE_GIF = 'image/gif',
  + IMAGE_SVG_XML = 'image/svg+xml',
  + AUDIO_MPEG = 'audio/mpeg',
  + AUDIO_OGG = 'audio/ogg',
  + AUDIO = 'audio/*',
  + VIDEO_MP4 = 'video/mp4',
  }
  