Updated podspec for 2.0.1 (Kitura#203)

* Updated podspec

* Update README for minimum toolchain versions

travis: update CI environments (Kitura#202)

* travis: update CI environments
* Add BlueSocketTestCommonLibrary, BlueSocketTestClient, BlueSocketTestServer
- Add a library component to make it easier to do tests and profiling under streaming loads (multiple client connections, lots of data, etc.)

* Removed Swift 4.x, bumped minimum swift version requirement to 5.1
* keep build at Swift 5.0; update CI to only test from 5.1.5 on up
* Only attempt to build command-line for Swift 5.2+
* Ensure tools and dependencies only build for Swift 5.2+
* Address various lint errors
* Update README with version details and latest iOS related issues

Merge pull request Kitura#192 from fouadhatem/patch-1

Update copyright info

Merge pull request Kitura#187 from yassineim/patch-1

an connection -> a connection

Update podspec to soon to be next version.

Update podspec to soon to be next version.

Update podspec to soon to be next version.

Minor format changes and adding of additional comments.

Update podspec to soon to be next version.

Update podspec to soon to be next version.