Re: [PR PATCH] [Merged]: pari: update to 2.13.2.

[ericonr <ericonr@users.noreply.github.com>]

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There's a merged pull request on the void-packages repository

pari: update to 2.13.2.
https://github.com/void-linux/void-packages/pull/32453

Description:
- enable pthreads build
- switch gp binary to static link libpari; this offsets the slowdown due to pthreads
- use -flto and -fno-semantic-interposition which improve speed a little bit more
- ship the static library, so external programs can static link
- change of maintainer agreed by sgn
- revbump giac and qcas

**Rationale:**
- pthreads gives an interesting functionality, and recent versions of giac require pari with tls; sagemath requires pari with pthreads.
- The cost for enabling pthreads is quite high, on the order of 30-40% for some tests; `-flto` saves maybe 1-2% at most, `-fno-semantic-interposition` saves 5-7%, but we are still about 25-30% behind.
- On the other hand, switching to static binary yields some savings on the order of 5-10%
- More important: the cost of enabling pthread with -flto for a static binary is only about 5-10%
- In summary: enabling pthread while switching to static is roughly the same speed (even maybe 5-10% better overall) as current binary, with an interesting feature (esp. if one has many cores) and apparently better compatibility.
- Shipping static library as well is easy and allows for external code linking to the static library.

@sgn: if you agree, I am willing to take over maintainership. I have used pari for 25+ years, and I use it almost daily.

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#### Have the results of the proposed changes been tested?
- [x] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me