Three uses of `hasOwnProperty.call` have been replaced with simpler
alternatives. I did this because I found this convention confusing.
The `ComposableObservableStore` changes required adding a check for
whether the `config` is defined, because the old syntax would allow
iterating over `undefined` as if it was an empty object. Functionally
it should be identical. A new test was added to highlight this
functionality.
A few inconsistencies in JSDoc formatting have been fixed throughout
the project. Many issues remain; these were just the few things that
were easy to fix with a regular expression.
The changes include:
* Using lower-case for primitive types, but capitalizing non-primitive
types
* Separating the parameter identifier and the description with a dash
* Omitting a dash between the return type and the return description
* Ensuring the parameter type is first and the identifier is second (in
a few places it was backwards)
* Using square brackets to denote when a parameter is optional, rather
than putting "(optional)" in the parameter description
* Including a type and identifier with every parameter
* Fixing inconsistent spacing, except where it's used for alignment
* Remove incorrectly formatted `@deprecated` tags that reference non-
existent properties
* Remove lone comment block without accompanying function
Additionally, one parameter was renamed for clarity.
