add report in the effects_code_generation, as it is the short form for both report_errors and report_warnings

Friendlier output on include_lib errors

Turns output like this:

    ===> Compiling apps/c/src/c.erl failed
    apps/c/src/c.erl:3: can't find include lib "parse_trans/include/codegen.hrl"

Into:

    ===> Compiling apps/c/src/c.erl failed
    apps/c/src/c.erl:3: can't find include lib
    "parse_trans/include/codegen.hrl"; Make sure parse_trans is in your app
    file's 'applications' list

Which is likely going to help newcomers encountering issues.

Bump certifi

fixed typo erl_first_files

Includes an update to parse_trans on an OTP-21 friendly version

smarter shell code reloading, add env options for refresh_paths & refresh_paths_blacklist

Warn but succeed when atoms are passed to erl_first_files

otp21 eperm fix for local install/upgrade, no need to set uid/gid

otp-21 eperm fix: bump of erlware_commons and relx

- Introduce support of add and del operations for overrides
 - OTP-21 compatibility
 - Bump cth_readable for OTP-21 compat
 - upgrade relx to 3.25.0
 - upgrade bbmustache to 1.5.0
 - run compile provider in default namespace from bare compiling (fixes
   hooks for mix builds)
 - Resolve string vs list crashing rebar3 in erl_first_files
 - Create ERLANG_LIB_*_erl_interface environment variables only if erl_interface exists
 - Add hooks to the upgrade command
 - Add --start-clean flag to rebar3 shell
 - Auto-boot main app in OTP app project templates
 - Use maps for child spec examples in templates
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Merge tag '3.6.0' into refresh_paths

Bump to 3.6.0

- Introduce support of add and del operations for overrides
- OTP-21 compatibility
- Bump cth_readable for OTP-21 compat
- upgrade relx to 3.25.0
- upgrade bbmustache to 1.5.0
- run compile provider in default namespace from bare compiling (fixes
  hooks for mix builds)
- Resolve string vs list crashing rebar3 in erl_first_files
- Create ERLANG_LIB_*_erl_interface environment variables only if erl_interface exists
- Add hooks to the upgrade command
- Add --start-clean flag to rebar3 shell
- Auto-boot main app in OTP app project templates
- Use maps for child spec examples in templates

Add OTP-21.0 to Travis

Bump cth_readable for OTP-21 compat

Revert "upgrade certifi to 2.3.1"

upgrade relx to 3.25.0

upgrade certifi to 2.3.1

upgrade bbmustache to 1.5.0

Finish adding specs for private funs in rebar3.erl

- added type specs for following private functions:
    - run/1
    - set_options/2
    - test_state/1
    - safe_define_test_macro/1
    - test_defined/1

run compile provider in default namespace from bare

Resolve string vs list crashing rebar3

- resolves #1645

Create ERLANG_LIB_*_erl_interface environment variables only if erl_interface exists

Introduce support of add and del operations under erl_opts directive

Add hooks to the upgrade command

Add --start-clean flag to rebar3 shell

Allows override of apps specified in other on-disk options. Equivalent
to `--apps=""`

Fixes #1785

As requested in #1733

Logger OTP-21-rc2 support

Also small output fix in rebar3 shell

Fix override_deps test from suite rebar_compile_SUITE