minor update to deps and ts4

• fix example 1c05d19
• upgrade c8 (#106) 3062f15
• chore(deps-dev): bump @microsoft/api-extractor from 7.9.22 to 7.13.0 (#104) 512652b
• chore(deps-dev): bump mocha from 8.1.3 to 8.2.1 (#102) 81c4056
• chore(deps-dev): bump rollup from 2.28.2 to 2.36.1 (#103) 6c16324
• upgrade typescript to 4x (#105) bbc8a48
• chore(deps-dev): bump @types/chai from 4.2.12 to 4.2.14 (#101) f184ef4
• chore(deps-dev): bump tslib from 2.0.0 to 2.1.0 (#97) 86120cf
• chore(deps-dev): bump ts-node from 8.10.2 to 9.1.1 (#87) f9bb7a0
• chore(deps-dev): bump prettier from 2.0.5 to 2.2.1 (#85) 39ab93c
• chore(deps-dev): bump @types/mocha from 8.0.3 to 8.2.0 (#99) d905b55
• chore(deps-dev): bump @types/node from 14.0.27 to 14.14.21 (#98) 9c852f4
• chore(deps-dev): bump @microsoft/api-extractor from 7.9.2 to 7.9.22 (#64) c23867a

v5.0.3...v5.0.4