Make tsconfig strict and add coverage

• style: turn on noImplicitAny 36fc36f
• style: format source files 4838f9f
• test: add tests for edge cases 17b144e
• refactor: with tsconfig to be more strict 2707a2a
• chore: update dependencies deda5f6
• chore: update dependencies 095dbb2

v6.0.0-1...v6.0.0-2