check type of parent of conditions before writting to PCS files

[dengdifan]

Should solve pcs write related issues: #79 and #110

[codecov]

Codecov Report

Merging #247 (ee0b6c3) into master (a8c5681) will decrease coverage by 0.34%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #247      +/-   ##
==========================================
- Coverage   67.07%   66.72%   -0.35%     
==========================================
  Files          17       17              
  Lines        1637     1665      +28     
==========================================
+ Hits         1098     1111      +13     
- Misses        539      554      +15     

Impacted Files	Coverage Δ
ConfigSpace/read_and_write/pcs_new.py	91.35% <100.00%> (+0.41%)	⬆️
ConfigSpace/read_and_write/json.py	80.00% <0.00%> (-5.26%)	⬇️
ConfigSpace/__init__.py	100.00% <0.00%> (ø)

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