v1.1.0

• Switch linting tool from 'tslint' to 'eslint'
• Switch HTTP library from 'request' to 'axios'
• Fix relative paths for playlists and chunks (issue #4)
• Fix issue in mergeFiles function where the promise returns before the file is written
• Fix issue when using a chunk directory without a trailing slash
• Improve message when there is a possible segment jump
• Stop refreshing the playlist in the background after a timeout is reached
• Add multiple unit tests