Upgrade module dependencies to support version dependencies. Now your module's "requires" string or array may specify the version in addition to the module, i.e. "HelloWorld>=1.0.1". You can also now use "PHP" or "ProcessWire" as version dependencies to specify that your module requires a particular version of PHP or ProcessWire. Example: "PHP>=5.4.0, ProcessWire>=2.4.1, HelloWorld>1.0.0". Versions for modules may be specified as version strings (like shown here) or integers, but integers are preferable since they are how we specify module versions in getModuleInfo() functions. But when specifying a PHP or ProcessWire version, you should always use the 3 part version string (i.e. 2.4.1).
Correct issue with 'requiredIf' dependencies sometimes not being processed when placed within a fieldset that has a showIf dependency. The scope of the issue may go furthe than that though, but not yet confirmed.