Fix pintk merge problem

[aarchiba]

Pintk was crashing because fake TOAs were missing a column. This adds that column.

[paulray]

Looks good to me!

[codecov]

Codecov Report

Merging #1307 (768af18) into master (a74b41d) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1307      +/-   ##
==========================================
- Coverage   61.61%   61.60%   -0.01%     
==========================================
  Files          89       89              
  Lines       20165    20166       +1     
  Branches     3611     3611              
==========================================
  Hits        12424    12424              
- Misses       6966     6967       +1     
  Partials      775      775              

Impacted Files	Coverage Δ
src/pint/pintk/pulsar.py	33.33% <0.00%> (-0.10%)	⬇️

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