config/v2.0.0

What's Changed

• Rename DATA-token to DATA
• Rename XDATA-token to XDATA
• Rename development chain streamr to dev0
• Rename development chain ethereum to dev1
• Remove Environment type
• Remove development/production split in JSON document
• Remove env argument from: Chains.load(env) => Chains.load()
• Remove Chains.loadFromNodeEnv()
• Rename dev1 Token to DATA

Full Changelog: config/v1.1.0...config/v2.0.0