chore: release 3.0.0

ci: swap travis in favor of circleci

chore: add files property to package.json file

chore: add build script

chore: update dependencies

chore(deps-dev): bump uglify-es from 3.2.0 to 3.3.9 (#7)

chore(deps-dev): bump rollup-plugin-uglify from 2.0.1 to 4.0.0 (#6)

fix(prop): support objects with a null prototype (#5)

chore(release): 2.0.2

fix(prop): last commit broke the package

chore(release): 2.0.1

chore(bundle): bundle browser as umd of iife

ci(travis): fix travis formatting issue

chore(release): 2.0.0

chore(builds): update tests and readme