* fix(versioning/hex): handle Elixir == pin prefix in isSingleVersion
Hex versioning inherited npm's isSingleVersion which only strips a single
= prefix. Elixir uses == for pinning, so "== 1.7.16" was not recognized
as a pinned version, causing duplicate pin PRs on every update.
Add isSingleVersion override that handles the double == prefix and add
getPinnedValue to emit the correct == prefix when pinning.
* fix: use non-null assertion instead of optional chaining in test
Refactors `getNewValue` logic to replace it with an optional
`getPinnedValue()` where rangeStrategy=pin. This way each versioning
module doesn't need to add and test extensive "pin" logic.
This should not be breaking, but out of an abundance of caution, we'll
mark it as such.
Moves datasource, manager, platform and versioning code from lib/ into new lib/modules/
BREAKING CHANGE: External tools must update paths to datasource, manager, platform and versioning
Florian Arens