v7.6.0

v7.5.2...v7.6.0

#674 - introduces "subsite" support
#675 - sets minimum agora-auth version to 1.2.0 for subsite support

Feature:

• Adds support for "subsites"

sites
└── site-name
    ├── bootstrap.yaml
    ├── config.yaml
    ├── index.js
    └── subsites
        └── susbsite-name
            ├── bootstrap.yaml
            ├── config.yaml
            ├── index.js
            └── media