Fix keepalive onPingResponse subscribe response doesnt work right #118

[mmubasher]

Please check if the PR fulfills these requirements

• [x] The commit message follows our guidelines: https://github.com/HackedByChinese/ng2-idle/blob/master/CONTRIBUTING.md#pr
• [x] Tests for the changes have been added (for bug fixes / features)
• [] Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x")

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Other... Please describe:

What is the current behavior? (You can also link to an open issue here) keepalive onPingResponse subscribe response doesnt work right #118

What is the new behavior?

Does this PR introduce a breaking change? (check one with "x")

[ ] Yes
[x ] No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[coveralls]

Coverage increased (+0.001%) to 99.37% when pulling a65451d32da800f8851ff9bb17db7fcb593a591f on mmubasher:master into f3e1e177b6f2f9063639e3be0f0e942bdb70872a on HackedByChinese:master.

[mmubasher]

@HackedByChinese Thank you for accepting the request. Any idea when next release will be and when the latest npm packages will be available? Thank you