Release 3.4.2

Version Bump v3.4.1: Twilio branding

Version Bump v3.4.0: Rollup Release

Version Bump v3.3.0: #22 Added cancellation of requests using Cancell…

…ation Token

Version Bump v3.2.0: #23 Timeout Parameter

Version Bump v3.1.0: PR #18 - Cache HTTP Client

Version Bump v3.0.0: BREAKING CHANGE - async fix #9

Version Bump v2.0.7: Pull Request #11: WebProxy

Version Bump v2.0.6: add strong name

Version Bump 2.0.5: Fix #7