fix: create closed channel on mark

Merge pull request #24 from jeroenrinzema/v0.6.0-rc

V0.6.0

Merge pull request #23 from jeroenrinzema/v0.5.0-rc

V0.5.0 rc

Merge pull request #22 from jeroenrinzema/v0.4.0-rc

V0.4.0 rc

Merge pull request #21 from jeroenrinzema/v0.3.1-rc

fix: check if err is nil

Merge pull request #20 from jeroenrinzema/0.3.0-rc

v0.3.0

Merge pull request #19 from jeroenrinzema/context

Assign handles before client

feat: improved dialect to allow handle openening before client alloca…

…tion

Merge pull request #18 from jeroenrinzema/context

Context

fix: resolves #17, mocking race conditions and deadlocks