fix: change name popper.js-1.14.3 to popper-core-1.14.3

[mangelft]

The update_thirdparty.sh fails because the name of the library popper.js-1.14.3 has changed to popper-core-1.14.3

[codecov-io]

Codecov Report

Merging #453 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #453      +/-   ##
==========================================
+ Coverage   11.85%   11.87%   +0.01%     
==========================================
  Files          74       74              
  Lines        7505     7505              
==========================================
+ Hits          890      891       +1     
+ Misses       6615     6614       -1

Impacted Files	Coverage Δ
bin/packages/Import_helper.py	87.03% <0%> (+1.85%)	⬆️

---

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 a77d16f...b5beb89. Read the comment docs.

[Terrtia]

Hi @mangelft !
Good catch, thank you !