v1.7.0

• [New] add support for WeakMap and WeakSet
• [Refactor] add early bailout to isMap and isSet checks
• [meta] add funding field
• [meta] add copyright to LICENSE (#21)
• [Dev Deps] update eslint, @ljharb/eslint-config, core-js, tape
• [Tests] use shared travis-ci configs
• [Tests] use npx aud in posttest
• [Tests] Fix invalid strict-mode syntax with hexadecimal (#22)
• [Tests] add linting