Fix ESPN Radio podcast catcher regex

[asuhan]

Make it more precise and compatible with Boost.Regex syntax as well.

[sunknudsen]

@asuhan Hi, could you please add a test for your ESPN Radio regex to https://github.com/ua-parser/uap-core/blob/master/tests/test_ua.yaml? Thanks!

[asuhan]

Hello, it's already covered, for example: https://github.com/ua-parser/uap-core/blob/master/test_resources/podcasting_user_agent_strings.yaml#L364. My change doesn't break these tests and works with C++ as well (for reference: ua-parser/uap-cpp#18).

[commenthol]

LGTM

[silviucpp]

any idea when this fix will be merged ?

[sunknudsen]

@asuhan @silviucpp Hey guys, the tests in the test_resources are legacy. Can you please add a test for your ESPN Radio regex to https://github.com/ua-parser/uap-core/blob/master/tests/test_ua.yaml? Once done, I will merge your pull request. Thanks!

[asuhan]

@sunknudsen As I've already pointed out, https://github.com/ua-parser/uap-core/blob/master/test_resources/podcasting_user_agent_strings.yaml#L364 contains tests for the regex I'm changing. They still pass; they look adequate. I have no idea how else to test this change. Does this mean porting them over to test_ua.yaml?

[asuhan]

I've simply copied the tests to tests/test_ua.yaml, no idea if they pass since the PR has conflicts.