Add first moment inside interval

[TSGut]

Fix #7

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.06 🎉

Comparison is base (941e9d1) 89.71% compared to head (8f84c08) 89.78%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #8      +/-   ##
==========================================
+ Coverage   89.71%   89.78%   +0.06%     
==========================================
  Files           5        5              
  Lines         321      323       +2     
==========================================
+ Hits          288      290       +2     
  Misses         33       33              

Impacted Files	Coverage Δ
src/power.jl	93.54% <100.00%> (+0.44%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[TSGut]

I think this is good to go @dlfivefifty

[dlfivefifty]

@ioannisPApapadopoulos I think with this we have a fast code for building collocation matrices with power law kernels