Allow Subtypes of HalRepresentation in withEmbedded

[martinei]

Currenlty one can not easily embedd some Foo extends HalRepresentation.

[codecov-io]

Codecov Report

Merging #10 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #10   +/-   ##
=========================================
  Coverage     83.41%   83.41%           
  Complexity      296      296           
=========================================
  Files            14       14           
  Lines           778      778           
  Branches        130      130           
=========================================
  Hits            649      649           
  Misses           60       60           
  Partials         69       69

Impacted Files	Coverage Δ	Complexity Δ
...ain/java/de/otto/edison/hal/HalRepresentation.java	75% <ø> (ø)	19 <ø> (ø)	❌

---

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 c2934e7...ce7687d. Read the comment docs.

[gsteinacker]

Thank you!