v2.1.3

• npm audit fix (#85)
• Use destructuring assignment (#84)
• Add Node.js11 to CI setting (#83)
• Add 'collectCoverage' option to 'jest' (#82)
• Add error case test (#81)
• Upgrade googleapis (#80)
• Modify to follow the rules of the new 'standard' (#79)
• Update CI test to LTS version (#78)
• Remove jest setting (#77)
• Upgrade packages and add jest settings (#76)