Bump backport to 4.6.3

[sorenlouv]

Various fixes:

• Delete origin remote to avoid confusion

v.4.6.3: Open editor automatically

Adds editor option which allows the user to specify an editor of their choice that will be opened if a conflict occurs. Easiest way to use editor option is by adding it to the global config:

{
  "username": "sqren",
  "accessToken": "very_secret_token",
  "editor": "code"
}

v.4.6.2: Disable fork-mode

Adds the ability to create backports in the origin repository instead of in a fork. Fork mode is still the default. To disable fork mode run backport --fork=false or add it to the project config:

{
  "upstream": "elastic/kibana",
  "branches": [{ "name": "7.x", "checked": true }, "7.3", "7.2"],
  "fork": false
}

All changes between v4.6.1 - 4.6.3
https://github.com/sqren/backport/compare/e53de81321481d09741557a77a5926e1874fe2b1..master

[tsullivan]

Adds the ability to create backports in the origin repository instead of in a fork

I've been incorrectly saying the terms "fork" and "origin" interchangeably. I like this change as it makes the naming specialties less of a concern for me as a developer using the tool :)

[tsullivan]

LGTM, reviewed the changed lines

[sorenlouv]

I've been incorrectly using "fork" and "origin" interchangeably.

tbh I am still not sure what the correct definition of origin is so getting rid of it seemed like the easiest solution :D

[elasticmachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request

[sorenlouv]

retest

[elasticmachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request