native-migration: some color formatting to puts statements

--HG--
branch : heptapod-stable
12 jobs for !278 with topic/heptapod-stable/native_followup in 27 minutes and 54 seconds
latest detached
Status Name Job ID Coverage
  Lint
passed rubocop #249689

00:09:57

 
  Test
passed rspec-regular 1/8 #249693

00:16:08

passed rspec-regular 2/8 #249694

00:17:53

passed rspec-regular 3/8 #249695

00:07:42

passed rspec-regular 4/8 #249696

00:08:40

passed rspec-regular 5/8 #249697

00:10:10

passed rspec-regular 6/8 #249698

00:07:00

passed rspec-regular 7/8 #249699

00:08:17

passed rspec-regular 8/8 #249700

00:08:22

passed workhorse:test using go 1.15 #249691

00:07:53

passed workhorse:test using go 1.16 #249692

00:01:57

passed workhorse:verify #249690

00:07:12