Minor changes in some packages

[princesinha19]

Description

Changed readme section os some module. Also, changed some typings and package dependency.

Type of change

• Enhancement

Checklist:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no warnings.
• I have updated or added types for all modules I've changed
• Any dependent changes have been merged and published in downstream modules.
• I ran npm run test in the root folder with success and extended the tests if necessary.
• I ran npm run build in the root folder and tested it in the browser and with node.
• I ran npm run dtslint in the root folder and tested that all my types are correct
• I have tested my code on an ethereum test network.

[coveralls]

Coverage remained the same at 95.545% when pulling db1a4e8 on princesinha19:readme-fix into b18a1eb on ethereum:1.0.

[coveralls]

Coverage remained the same at 95.55% when pulling 1a02a98 on princesinha19:readme-fix into 18eb61e on ethereum:1.0.