fix: completion of USE ONLY interaces

[gnikit]

Fixes #150

[codecov]

Codecov Report

Merging #239 (ef05393) into master (f98d79c) will increase coverage by 0.22%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #239      +/-   ##
==========================================
+ Coverage   86.43%   86.65%   +0.22%     
==========================================
  Files          12       12              
  Lines        4475     4475              
==========================================
+ Hits         3868     3878      +10     
+ Misses        607      597      -10     

Impacted Files	Coverage Δ
fortls/langserver.py	84.30% <100.00%> (+0.68%)	⬆️
fortls/objects.py	83.22% <0.00%> (+0.07%)	⬆️
fortls/parse_fortran.py	88.93% <0.00%> (+0.16%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.