Build meta returning null on second call

[KaneFreeman]

Bug

The Build meta class does not properly cache non-Promise function calls.

Package Version: 5.0.0-alpha.4

Code

• Example: https://site-qrevkcphgg.now.sh/tutorials/another-tutorial
• Source (with corrected Build meta, thanks @matt-gadd ): https://github.com/KaneFreeman/site

Expected behavior:

The second call to the build meta should return the cached version of the response.

Actual behavior:

The second call to the build meta returns null.