Fix: tbls out -t config does not set default values

[k1LoW]

No description provided.

[codecov]

Codecov Report

Merging #170 into master will decrease coverage by 1.23%.
The diff coverage is 30%.

@@            Coverage Diff             @@
##           master     #170      +/-   ##
==========================================
- Coverage   70.37%   69.14%   -1.24%     
==========================================
  Files          15       15              
  Lines        2802     2810       +8     
==========================================
- Hits         1972     1943      -29     
- Misses        626      667      +41     
+ Partials      204      200       -4

Impacted Files	Coverage Δ
output/config/config.go	45.16% <0%> (-3.18%)	⬇️
config/config.go	46.53% <50%> (+0.08%)	⬆️
datasource/datasource.go	20.85% <0%> (-19.02%)	⬇️

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