Handful of improvements

• docs(README): update badges 79c661e
• chore: define main field 2df3b52
• ci: use node12 and latest for testing c99e7a8
• refactor: use config values for the abstract logger e512d0c
• chore: remove tslint in favor of eslint 0955b7c
• chore: update dependencies 3174cd1

v1.1.6...v1.1.7