It is not currently possible in a default cPanel configuration to use two minor versions of the same PHP major version concurrently. This will probably not happen until EasyApache 3's successor is developed, as part of our overall shift to using RPM packages instead of compiling from source. EasyApache will be the last cPanel component to be changed from source to RPM.
There is already at least one feature request for this:
I recommend you add your voice to that feature request. Our developers look carefully at the feature requests and this helps them to plan and prioritize changes to the product.
There is more information about this in another forum thread, as noted in the feature request: