15.7.0-canary.11

Patches

• [now dev] Add test case for lazily installing builders: #2510
• [now dev] Throw an error if dev scripts contain now dev in package.json: #2507
• [now dev] Improve now dev output message: #2506
• Simplify builds output message: #2512
• Handle 400 create alias error: #2514

Credits

Huge thanks to @TooTallNate for helping!