all: starting development of 2.8.3
lib: config: new option 'cupt::console::actions-preview::show-empty-versions'

Backported from 2.9.0~.
test: TestCupt: enabled 'show-empty-versions' option
test: TestCupt: added get_inc_code()

Backported from 2.9.0~.
test: TestCupt: get_inc_path: support symlinked 't' directory
test: manage: resolver: same-pin-versions: added
lib: internal: cacheimpl: refactoring: new methods 'addRealPackageSatisfyingVersions' and 'addVirtualPackageSatisfyingVersions'

(cherry picked from commit 244016b6fc59352cade42723cd75c1596bf8df6a)
lib: internal: {cacheimpl, nativeresolver: dependencygraph}: place otherwise-equal higher versions of same package first

(cherry picked from commit d444c773c79c65fca01b90316fd8420a4275ab9a)
all: 2.8.3 release
Merge branch 'fixes/2.8'