Updated changelog for 6.0 release

13 jobs for OpenMesh-6.0
Status Job ID Name Coverage
  Test
passed #4446
Linux
clang-c++11

00:21:47

passed #4448
Linux
clang-c++98

00:16:14

passed #4445
Linux
gcc-c++11

00:04:13

passed #4467
Linux
gcc-c++98

00:03:55

passed #4449
Apple
macos-c++11

00:09:10

passed #4450
Apple
macos-c++98

00:14:10

passed #4440
Linux
clang-c++11

00:23:00

passed #4442
Linux
clang-c++98

00:14:32

passed #4439
Linux
gcc-c++11

00:05:58

failed #4447
Linux
gcc-c++98

01:00:00

passed #4441
Linux
gcc-c++98

00:04:01

passed #4443
Apple
macos-c++11

00:15:14

passed #4444
Apple
macos-c++98

00:08:22