Enforce explicit Some around raw values

[juntyr]

Since a ron::value::RawValue can contain anything, implicit Some must be made explicit around it.

* [ ] I've included my change in CHANGELOG.md

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (ba66c8e) 96.11% compared to head (bcdcfb9) 96.12%.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the GitHub App Integration for your organization. Read more.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #494   +/-   ##
=======================================
  Coverage   96.11%   96.12%           
=======================================
  Files          77       77           
  Lines        9867     9890   +23     
=======================================
+ Hits         9484     9507   +23     
  Misses        383      383           

Files Changed	Coverage Δ
src/ser/mod.rs	96.77% <100.00%> (+0.03%)	⬆️
tests/407_raw_value.rs	100.00% <100.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.