Trailing newline is missing from `bit update` output

[yermulnik]

Describe the bug bit update doesn't put a trailing newline to outputted message when completes the update.

To Reproduce Run bit update and watch its output.

Expected behavior Newline is put at the end of bit update command output.

Screenshots

11:58:58 [georgii_iermulnik@epuakyiw4608][j:0][~]> sudo bit update
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Updated bit v0.8.0 to v0.9.1 in /usr/local/bin11:59:32 [georgii_iermulnik@epuakyiw4608][j:0][~]>

Desktop (please complete the following information):

• OS: macOS Catalina 10.15.6 x86_64
• Terminal: iTerm2 3.3.12
• Shell: GNU bash, version 5.0.18(1)-release (x86_64-apple-darwin19.5.0)

Additional context (Add any other context about the problem here) First reported in #63

[yermulnik]

@chriswalz Thank you!