bitbake: fetch2/npm: handle items only in optionalDependencies

An npm package.json file has two dependency fields: dependencies and
optionalDependencies. An item in optionalDependencies *may* also be
listed in dependencies, but this is not required (and not necessary
since if it's in optionalDependencies it will be optional, adding it to
dependencies won't do anything). The code here was assuming that an
optional dependency would always be in both, that's probably because
that was true of the examples I was looking at at the time. To fix it,
just add the optional ones to the list we're iterating over.

(Bitbake rev: c0c50d43266150a80be31ae2c6fcaf37f5ba231d)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/npm.py

@@ -195,6 +195,7 @@ class Npm(FetchMethod):
 
         dependencies = pdata.get('dependencies', {})
         optionalDependencies = pdata.get('optionalDependencies', {})
+        dependencies.update(optionalDependencies)
         depsfound = {}
         optdepsfound = {}
         data[pkg]['deps'] = {}