Dependency updates

[Interghost]

There are 2 PRs (#23, #24) open for dependency update... can this be merged?
There is no feedback for almost a year now, and its blocking other project's PRs waiting for this.

[peter279k]

@Interghost . After running the Travis CI build for PR #23 and #24 again, they're failed.

And the error messages are as follows:

 message: 'An issue occured while attempting to get the subscription: session not created: This version of ChromeDriver only supports Chrome version 75\n  (Driver info: chromedriver=75.0.3770.90 (a6dcaf7e3ec6f70a194cc25e8149475c6590e025-refs/branch-heads/3770@{#1003}),platform=Linux 4.4.0-101-generic x86_64)'

I think we should fix this issue before merging these PRs.

[peter279k]

I also create the PR #26 to merge PR #23 and #24.

And it also fixes Travis CI build :).