Remove previously inserted elements in heap when running GC

[hackerwins]

What this PR does / why we need it?

Remove previously inserted elements in heap when running GC.

Any background context you want to provide?

What are the relevant tickets?

Fixes #214

Checklist

• Added relevant tests or not required
• Didn't break anything

[codecov]

Codecov Report

Merging #216 (1b60426) into main (b7caae4) will increase coverage by 0.02%.
The diff coverage is 79.06%.

@@            Coverage Diff             @@
##             main     #216      +/-   ##
==========================================
+ Coverage   79.65%   79.68%   +0.02%     
==========================================
  Files          49       49              
  Lines        2797     2820      +23     
  Branches      465      469       +4     
==========================================
+ Hits         2228     2247      +19     
- Misses        401      404       +3     
- Partials      168      169       +1     

Impacted Files	Coverage Δ
src/document/json/rht_pq_map.ts	67.27% <66.66%> (-2.30%)	⬇️
src/document/proxy/object_proxy.ts	75.28% <66.66%> (-0.86%)	⬇️
src/api/converter.ts	81.81% <88.23%> (+0.24%)	⬆️
src/document/json/element.ts	88.23% <100.00%> (+14.90%)	⬆️
src/document/json/object.ts	82.00% <100.00%> (ø)
src/document/json/rga_tree_list.ts	85.60% <100.00%> (ø)

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