version: parse tag if detecting version

dev-cmd/extract: allow maintainers to extract to core.

I was wanting to do this today to add `ruby@2.6` and it's a social
rather than technical requirement (i.e. we don't want users to mess
with their homebrew/core unless they know what they are doing) so allow
overriding with `HOMEBREW_DEVELOPER` set.

build: bump parser from 2.7.0.2 to 2.7.0.3 in /Library/Homebrew

formula: sort versioned_formulae by version

Inline versions of upgraded formulae

Bumps [parser](https://github.com/whitequark/parser) from 2.7.0.2 to 2.7.0.3.
- [Release notes](https://github.com/whitequark/parser/releases)
- [Changelog](https://github.com/whitequark/parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/whitequark/parser/compare/v2.7.0.2...v2.7.0.3

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-Authored-By: Bo Anderson <mail@boanderson.me>

Co-Authored-By: Mike McQuaid <mike@mikemcquaid.com>

rubocop/urls: add go@1.13 to binary URLs whitelist

extract: handle versioned formulae names

bump-formula-pr: improve mirror handling

log: use user path

Revert "pull: use `homebrew` remote if HOMEBREW_FORCE_HOMEBREW_ON_LINUX"

- This reverts commit 9fb18761 and commit
f8863c8a.
- The `JENKINS_HOME` envvar appears to be unset on the Linux Jenkins
master that holds the BinTray credentials.
- It's bed time, we're too tired to be fixing forward!

pull: fix remote on jenkins

pull: use `homebrew` remote if HOMEBREW_FORCE_HOMEBREW_ON_LINUX

Add ghc@8.6 to binary formula URLs whitelist

Without this, one can't use a custom pager, if it's present in
non-standard PATH, like for example Homebrew on Linux prefix.

Fix detecting version from URL

Turn the output versioned formula from the form "name@version" to
"name-version", then following by appending the specific version
after it.

This solution ensures that separate extracted versions of a formulae
can exist alongside each other (e.g. 'python-2@2.7.17' and
'python-2@2.7.16').

analytics: tweak behaviour.