feat: replace server url with server host and pathname (asyncapi#888) 

fix: use union for operation action (asyncapi#905) 

feat: release for version 2.6.0 of the spec (asyncapi#902) Co-authored-by: Sergio Moya <1083296+smoya@users.noreply.github.com> Co-authored-by: Alex Wichmann <VisualBean@users.noreply.github.com> Co-authored-by: asyncapi-bot-eve <bot+eve@asyncapi.io> Co-authored-by: Jeremy Whitlock <jwhitlock@apache.org> Co-authored-by: Lukasz Gornicki <lpgornicki@gmail.com> Co-authored-by: derberg <lpgornicki@gmail.com> Co-authored-by: Maciej Urbańczyk <urbanczyk.maciej.95@gmail.com> Co-authored-by: Vladimír Gorej <vladimir.gorej@gmail.com>

feat: add Pulsar bindings to the specification. (asyncapi#882) Co-authored-by: Sergio Moya <1083296+smoya@users.noreply.github.com> Co-authored-by: Tenshi Codes <116377630+codingtenshi@users.noreply.github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: asyncapi-bot <bot+chan@asyncapi.io> Co-authored-by: Fran Méndez <fmvilas@gmail.com> Co-authored-by: Animesh Kumar <kumaranimesh923@gmail.com> Co-authored-by: Lukasz Gornicki <lpgornicki@gmail.com> Co-authored-by: Maciej Urbańczyk <urbanczyk.maciej.95@gmail.com> Co-authored-by: Vladimír Gorej <vladimir.gorej@gmail.com>

feat: unify all referencing mechanisms (asyncapi#852) 

feat: add missed "metadata" fields in the Server/Channel/Operation Ob… …jects (asyncapi#796) Co-authored-by: Jonas Lagoni <jonas-lt@live.dk>

fix: remove action and channel fields from Operation Trait Object (as… …yncapi#860)

feat: move root tags and externalDocs to the info object (asyncapi#794) Co-authored-by: Jonas Lagoni <jonas-lt@live.dk>

feat: add more reusable objects to the components object (asyncapi#792) Co-authored-by: Jonas Lagoni <jonas-lt@live.dk>

Merge master into next-major-spec