Update ChangeLog-1.8.x

Resolve 522: Back port tests from main to LTS (#523)

Resolve 522

* Backport test : 900NormalizationMCMCCheck.C

This test is updated to take into account the MCMC effective sample
size when checking the expected values.  The effective decorrellation
length is a guess, but based on looking at the input sample.

* Backport test : 900HorrifyingMCMCCheck.C

This test is updated to take into account the MCMC effective sample
size when checking the expected values.  The effective decorrellation
length is a guess, but based on looking at the input chain.

* Update the change log

Merge pull request #500 from gundam-organization/499-lts18x-data-hist…

…ograms-not-filled

Resolve LTS/Issue499: Set the status of branches

Fixes relative to 1.8.0

Issue #485 : A job will correctly continue when the likelihood returns an infinite value. The job will stop if the likelihood returns a NaN.

Issue #486 : Fix the Catmull-Rom splines so that they have symmetric
behavior. This changes the extrapolation behavior for both Catmull-Rom
and Catmull-Rom,monotonic splines. The Catmull-Rom monotonic splines are
updated to use the full Fritsche-Carlson criteria so that the
interpolation is smoother.

Merge pull request #469 from gundam-organization/fix/varSplitPlot

properly grabbing the split value rather than its index :)

Merge pull request #430 from gundam-organization/feature/janitorial

fixing yaml-cpp lib finding on macos

don't throw an error. Bad JSON from ROOT may have messed up its own i…

…mplementation again.

Merge pull request #340 from gundam-organization/feature/fitInfoAddit…

…ions

Lighter outputs before tagging 1.7.1

Merge pull request #325 from gundam-organization/feature/lineScanner

Adding line scanner feature

Merge pull request #216 from gundam-organization/feature/banffFit

updating toolbox