gnucash maint: Release GnuCash 4.5

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/f2f81631 (commit)
	from  https://github.com/Gnucash/gnucash/commit/ec949755 (commit)



commit f2f8163121bf6b4b01f58e1fceca15e6af3dd79c
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat Mar 27 15:03:16 2021 -0700

    Release GnuCash 4.5



Summary of changes:
 CMakeLists.txt |   3 +-
 NEWS           | 213 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 206 insertions(+), 10 deletions(-)