Create isEmptyObject helper

[n8rzz]

if (!_isObject() || _isEmpty()) { ... }

This is a very common pattern throughout the app.

• investigate if this is an existing method within lodash

if not:

• abstract to a helper function
• add tests
• update usages
• update existing tests to test only A vs B logic branches for new function

---

the following tests should all pass:

ava('.isEmptyObject() returns false when passed a non-object', (t) => {
    t.false(isEmptyObject('threeve'));
    t.false(isEmptyObject(false));
    t.false(isEmptyObject(42));
});

ava('.isEmptyObject() returns false when passed an object with properties', (t) => {
    t.false(isEmptyObject({
        a: 'threeve',
        b: 42,
        c: false
    }));
});

ava('.isEmptyObject() returns true when passed an empty object', (t) => {
    t.true(isEmptyObject({}));
    t.true(isEmptyObject([]));
    t.true(isEmptyObject(null));
});