[fixed] onAfterClose prop called when unmounting a closed modal

[gados3]

Fixes #745

Changes proposed:

• onAfterClose prop will no longer be triggered when unmounting a closed modal, but will still be when unmounting an opened modal.
• Added .vscode folder to .gitignore

Upgrade Path (for changed or removed APIs): N/A

Acceptance Checklist:

• The commit message follows the guidelines in CONTRIBUTING.md.
• Documentation (README.md) and examples have been updated as needed.
• If this is a code change, a spec testing the functionality has been added.
• If the commit message has [changed] or [removed], there is an upgrade path above.

[coveralls]

Coverage increased (+0.03%) to 86.652% when pulling 0d970b2 on gados3:fix/745/onAfterClose-called-on-unmount into 6ff8d85 on reactjs:master.

[diasbruno]

@gados3 Thanks for the "ping" and sorry for forgetting this PR.

[diasbruno]

I'll release a new version soon (ping me again if i forget).

[diasbruno]

Thanks, @gados3. Released version 3.10.1.

[gdostie]

Awesome, thank you @diasbruno.