fix(group): prevent deadlock in Wait() when context is cancelled and …

…task queue is not empty

chore(test): run tests against the latest versions of go

fix(stop-and-wait): handle call to runtime.Goexit() in task

feat(optional-panic-recovery): Add option to disable panic recovery

Merge pull request #122 from tech-voker/chore/rename-result-interface

chore(future): rename Result interface to be consistent

feat(group): expose group context via Context() method

fix(pool): prevent hanging submits

fix(buffer): avoid holding references to submitted tasks

fix(pool): prevent deadlock on submitWaiters channel

feat(pool): add TrySubmit methods