Update copyright header to include year 2021

6 jobs for !1979 with c2021 in 17 minutes and 20 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Build
passed #19805
macos
build_macos

00:04:36

passed #19806
ubuntu1604
build_ubuntu1604

00:00:42

passed #19807
ubuntu1804
build_ubuntu1804

00:00:43

passed #19808
ubuntu1804-gcc8
build_ubuntu1804-gcc8

00:00:44

passed #19809
vc191x
build_vc191x

00:15:03

passed #19810
vc192x
build_vc192x

00:14:02