update marked to 0.5

[surya-prakash-susarla]

Changed 'marked' dependency version to 0.5 August release for fixing rendering bugs of formatted markdown cells.

closes #3874

[jasongrout]

For reference, see #3874

[surya-prakash-susarla]

@jasongrout Is the pr fine ?

[jasongrout]

I restarted the testing. It looks okay to me, but I haven't tested it.

[surya-prakash-susarla]

@jasongrout Hey, the travis ci build fails as per the checks. Is it because of this minor change? Could you please suggest how I might solve any issue from my side.

[Hyaxia]

Hey @Surya-06 , the problem is not from your side, its with the test.
check #4039 for the fix of travis's tests.
Enjoy!

[surya-prakash-susarla]

@Hyaxia Hey there, thanks for the update. Can you guide me on how to fix the tests, I am a newbie and don't know how to configure the tests for each PR.

[Hyaxia]

@Surya-06 It looks like you have made the right changes to the travis-ci configuration.
There is another problem ATM, with the appveyor tests.
It looks like there is some kind of problem with the setuptools/pip itself.
check #4039 for updates on the matter.

[surya-prakash-susarla]

@Hyaxia Yeah it looks like there some issue with the miniconda package attributes which triggers that whole chain of exceptions.

[Hyaxia]

@Surya-06 see my temporary fix for the bug 4c1d62f
It seems like there is a problem with the current of nbconvert or its dependencies that
anaconda installs, so we just use pip instead.

[minrk]

Thanks!