v2.3.0

• Cleaned up v2 package structure
• Switched from gopkg.in/yaml.v2 to gopkg.in/yaml.v3. Closes #70 and #71
• Package import path for go-vcr has changed from github.com/dnaeon/go-vcr to gopkg.in/dnaeon/go-vcr.v2. See #73
• v2 of go-vcr resides in the v2 branch, which is now the default
• Fixed a regression where the default mode of the recorder has been changed. See #72