Release flag --verbose has no effect

[eproxus]

Environment

$ rebar3 report "release --verbose 0"
Rebar3 report
 version 3.6.1
 generated at 2018-09-11T09:13:14+00:00
=================
Please submit this along with your issue at https://github.com/erlang/rebar3/issues (and feel free to edit out private information, if any)
-----------------
Task: release
Entered as:
  release --verbose 0
-----------------
Operating System: x86_64-apple-darwin17.7.0
ERTS: Erlang/OTP 21 [erts-10.0.7] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]
Root Directory: /Users/user/.asdf/installs/erlang/21.0.8
Library directory: /Users/user/.asdf/installs/erlang/21.0.8/lib
-----------------
Loaded Applications:
bbmustache: 1.5.0
certifi: 2.0.0
cf: 0.2.2
common_test: 1.16
compiler: 7.2.3
crypto: 4.3.2
cth_readable: 1.4.2
dialyzer: 3.3
edoc: 0.9.3
erlware_commons: 1.2.0
eunit: 2.3.6
eunit_formatters: 0.5.0
getopt: 1.0.1
hipe: 3.18
inets: 7.0.1
kernel: 6.0.1
providers: 1.7.0
public_key: 1.6.1
relx: 3.26.0
sasl: 3.2
snmp: 5.2.11
ssl_verify_fun: 1.1.3
stdlib: 3.5.1
syntax_tools: 2.1.5
tools: 3.0

-----------------
Escript path: undefined
Providers:
  app_discovery as auto build clean compile compile config cover ct cut deploy deps dialyzer do docs edoc escriptize eunit get-deps help info install install_deps key list lock new owner path pkgs publish release relup report search shell state tar tree unlock update upgrade upgrade upgrade user version version xref

Current behaviour

Using -V or --verbose with any value of 0, 1, 2 or 3 has no effect.

Expected behaviour

Different verbosity levels should be used.

[paulo-ferraz-oliveira]

It seems this flag is still present in 3.14.1, in the opts, but no longer in relx, since 4.0.0.