v1.0.0

Hooray! A major release! This release is 100% backwards-compatible, except for the minimum Node version (v10.0.0). Still, recaptcha-promise has matured enough to warrant a 1.0.0.

• Add methods for creating locally-configured instances (dee2250)
• Specify minimum Node version: 10.0.0 or newer (276d53c)

Modernizations behing the scenes:

• Rewrite with async and Axios library, instead of Bluebird and Request (ed86630)
• Use JS Standard style and configure linting (1225043)
• Add package-lock.json (1225043)

Misc.:

• Setup Travis CI (7e0f042)
• Create unit tests (100c963, bcd5c92)
• Add .npmignore (46de921)