Remove local web server & Carthage (#159)

### Summary
Conduit CI has been broken for a long time (since March 2020): 
- Last successful cron build was [10 months ago](https://travis-ci.org/github/mindbody/Conduit/builds/667694645) 
- Last successful PR build was also [10 months ago](https://travis-ci.org/github/mindbody/Conduit/builds/667774882)

This is mainly because the local web-server used for unit and integration tests was outdated. As new versions of Ruby and Python have been released, and our systems and CI servers upgraded, the local server stopped running. Quite some good tech-debt we had queued.

### Implementation
- Remove local web servers
  - httpbin has been replaced with calls to https://httpbin.org (as we originally had). Video assets have been reduced in size for faster round-trips during testing.
  - oauth-test-server has been removed and not replaced (a handful of tests have been disabled for now)
- Project and workspace files have been removed to simplify the codebase and maintenance efforts.
- Carthage support has also been removed, might be added later as XCFramework if there is public demand.
- Travis CI has been removed
- GitHub Actions have been set up for CI

.github/workflows/ci.yml

@@ -0,0 +1,15 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, release/* ]
+  pull_request:
+    branches: [ main, release/* ]
+
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Build and Test
+      run: swift test

CHANGELOG.md

@@ -13,6 +13,15 @@
 - None
 
 
+## 1.0.0
+
+#### Breaking
+- Remove Xcode project and worskpaces, dropping support for Carthage
+
+#### Other
+- Celebrating Conduit's maturity with our 1.0.0 release 🎉
+
+
 ## 0.22.0
 
 #### Breaking

Conduit.podspec

@@ -1,4 +1,4 @@
-$version = '0.22.0'
+$version = '1.0.0'
 
 Pod::Spec.new do |spec|
 	spec.name = 'Conduit'
@@ -12,8 +12,8 @@ Pod::Spec.new do |spec|
 	spec.ios.frameworks = 'Security', 'SystemConfiguration'
 	spec.tvos.frameworks = 'Security', 'SystemConfiguration'
 	spec.osx.frameworks = 'Security', 'SystemConfiguration'
-	spec.ios.deployment_target = '8.0'
+	spec.ios.deployment_target = '9.0'
 	spec.watchos.deployment_target = '2.0'
 	spec.tvos.deployment_target = '9.0'
-	spec.osx.deployment_target = '10.10'
+	spec.osx.deployment_target = '10.11'
 end