3.1.0

• Enforce node 10 (45b0e53)
• Use Prettier (184b83d)
• Fix travis config format (3198c21)
• Bump rollup-plugin-commonjs from 9.2.0 to 10.1.0 (6bd4e6d)
• Bump rollup-plugin-node-resolve from 4.0.0 to 5.2.0 (440cc9a)
• Bump tslint-config-prettier from 1.17.0 to 1.18.0 (b7cf2bd)
• Bump typescript from 3.2.2 to 3.8.3 (22dc01b)
• Bump karma from 3.1.4 to 4.4.1 (a2b86f9)
• Bump rollup-plugin-typescript2 from 0.18.1 to 0.27.0 (644cecb)
• Bump mocha from 5.2.0 to 7.1.1 (d33d09b)
• Bump karma-chrome-launcher from 2.2.0 to 3.1.0 (a52fdb9)
• Bump karma-typescript from 3.0.13 to 5.0.2 (e83a7e8)
• Bump rollup from 0.68.2 to 2.3.3 (b6d758e)
• Bump @types/chai from 4.1.7 to 4.2.11 (1b44bca)
• Bump tslint from 5.12.0 to 6.1.1 (550ab22)
• Bump @types/sinon from 7.0.3 to 9.0.0 (75a5433)
• Bump sinon from 7.2.2 to 9.0.1 (b024528)
• Build in CI (e160dd1)
• Bump @types/mocha from 5.2.5 to 7.0.2 (5a4859d)
• Bump banner-cli from 0.11.1 to 0.14.1 (51bf149)