Update dependencies and Node support

Updates dependencies to the latest versions.

Breaking changes:

• Minimum supported Node version changed from >=10 to >= 14

Changes:

• remove failing dependencies badge d46438b
• Merge pull request #15 from heldinz/update-deps dc1534e
• add changelog b992c34
• fix branch name in coveralls links c64e450
• update nyc and coveralls b9773bd
• update minimum node version in .travis.yml 43f4ba8
• increase minimum node version from 10 to 14 5b69b13
• upgrade mocha f559fd5
• npm audit fixes 40c8614
• update package-lock.json d181350

v2.1.0...v3.0.0

Version 2.1.0

Update outdated dependencies and specify Node 10+.
iconv-lite is now at 0.5.1.