mail/mutt: Update to 1.14.5

Update mail/mutt to 1.14.5, this is a security fix release, with fixes for
CVE-2020-14093 and CVE-2020-14954

PR: 247400
Submitted by: Derek Schrock
MFH: 2020Q2
Security: 5b397852-b1d0-11ea-a11c-4437e6ad11c4

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