Fixed documentation

• Bumped np version 14b907e
• Updated package.json 8739194
• Update license 53dbd0a
• Update readme.md 9eb4815
• Update readme.md a12fc45
• Update readme.md 54360a1

v2.0.1...v2.1.0

1.0.1

Removed subject parameter.
Added options parameters (passed directly to sns.publish())

1.0.0

Publish using np