Method GenericTypeReflector#getArrayComponentType(Type) throws NullPointerException is a non-array Class type

[sigpwned]

The following code fails under (current) master (and v1.3.16, and v2.0.0):

    GenericTypeReflector.getArrayComponentType(Integer.class);

Specifically, it throws a NullPointerException.

The (current) documentation for all overloads of the getArrayComponentType method is:

    /**
     * If type is an array type, returns the annotated type of the component of the array.
     * Otherwise, returns null.
     */
    public static AnnotatedType getArrayComponentType(AnnotatedType type) {
        // implementation
    }

    /**
     * If type is an array type, returns the type of the component of the array.
     * Otherwise, returns null.
     */
    public static Type getArrayComponentType(Type type) {
        // implementation
    }

Based on my read, it should be safe to pass non-array Class objects to the method, and I would expect the method to return null when I do so.

Hopefully it's not presumptuous, but I have opened PR #33 with a proposed solution.

I hope this all made sense. If not, please don't hesitate to send me any questions or concerns!