Revert "feat: merge mixins options"

[TheAlexLichter]

This reverts commit ad4d61c.

Sorry for the problems and inconveniences caused!

Resolves #269 nuxt-modules/i18n#127 nuxt/nuxt#3957

[codecov]

Codecov Report

Merging #273 into master will decrease coverage by 1.26%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #273      +/-   ##
=========================================
- Coverage   41.57%   40.3%   -1.27%     
=========================================
  Files          18      18              
  Lines         267     263       -4     
=========================================
- Hits          111     106       -5     
- Misses        156     157       +1

Impacted Files	Coverage Δ
src/shared/plugin.js	51.72% <ø> (-1.61%)	⬇️
src/shared/getComponentOption.js	100% <100%> (ø)	⬆️
src/shared/getMetaInfo.js	94.64% <0%> (-1.79%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8830f1b...73c1ee3. Read the comment docs.

[bdrtsky]

So, merging is not working? I am trying to use head from mixin with Nuxt and it doesn't work.

[TheAlexLichter]

We had to revert that PR because it broke reactivity here and there.
Feel free to create another issue if there is none yet @bdrtsky