Update Sha of 3.6

[Carreau]

It looks like the sha was wrong; but for whatever reason it was not
installed via homebrew on travis/3.6 until a week or so ago as travis
images still ahd 3.6 (?). I did not manage to check the GPG signatre of
3.6 on python.org; so it would be good to do that as well;

This should solve failure of test on IPython repo.

[Carreau]

Verified that the signature file and the pkg is correct:

$ gpg --keyserver keyserver.ubuntu.com --recv-keys 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
gpg: key 2D347EA6AA65421D: 18 signatures not checked due to missing keys
gpg: key 2D347EA6AA65421D: public key "Ned Deily (Python release signing key) <nad@python.org>" imported
gpg: marginals needed: 3  completes needed: 1  trust model: pgp
gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 1u
gpg: next trustdb check due at 2033-10-12
gpg: Total number processed: 1
gpg:               imported: 1

$ gpg --verify python-3.6.8-macosx10.6.pkg.asc python-3.6.8-macosx10.6.pkg
gpg: Signature made Mon Dec 24 08:15:55 2018 CET
gpg:                using RSA key 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
gpg: Good signature from "Ned Deily (Python release signing key) <nad@python.org>" [unknown]
gpg:                 aka "Ned Deily (Python release signing key) <nad@acm.org>" [unknown]
gpg:                 aka "Ned Deily <nad@baybryj.net>" [unknown]
gpg:                 aka "keybase.io/nad <nad@keybase.io>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: 0D96 DF4D 4110 E5C4 3FBF  B17F 2D34 7EA6 AA65 421D

To be sure it's trusted I can also verify via keybase.

$ keybase pgp pull nad
▶ INFO Imported key for nad. [tags:ENG=BIh26ULAKyq4]
▶ INFO Imported key for nad. [tags:ENG=BIh26ULAKyq4]

$ keybase pgp verify -d python-3.6.8-macosx10.6.pkg.asc -i python-3.6.8-macosx10.6.pkg
Signature verified. Signed by nad 1 year ago (2018-12-24 08:15:55 +0100 CET).
PGP Fingerprint: 0d96df4d4110e5c43fbfb17f2d347ea6aa65421d.

[minrk]

Thanks!

[Carreau]

Thanks ! Happy new year !