Add all of Virginia

The maintainer of this data tells me that no municipalities are missing. (Note the presence of Fairfax County.) Below are the address counts, per municipality, of the linked data:

```
25617	Accomack County
41760	Albemarle County
34870	Alexandria city
11799	Alleghany County
6546	Amelia County
15570	Amherst County
8139	Appomattox County
42987	Arlington County
34817	Augusta County
4003	Bath County
35229	Bedford County
3346	Bedford city
17562	Blacksburg Town
3890	Bland County
15678	Botetourt County
8226	Bristol city
9765	Brunswick County
15192	Buchanan County
8235	Buckingham County
3012	Buena Vista City
30861	Campbell County
12231	Caroline County
18762	Carroll County
3927	Charles City County
6452	Charlotte County
22590	Charlottesville city
98453	Chesapeake city
150896	Chesterfield County
11083	Christiansburg Town
6898	Clarke County
3128	Craig County
18873	Culpeper County
4807	Cumberland County
22738	Danville city
9889	Dickenson County
12227	Dinwiddie County
2710	Emporia city
6871	Essex County
366979	Fairfax County
8187	Fairfax city
3766	Falls Church city
2413	Farmville Town
28175	Fauquier County
8875	Floyd County
11279	Fluvanna County
30531	Franklin County
3690	Franklin city
34393	Frederick County
8888	Fredericksburg city
3382	Galax city
9127	Giles County
16833	Gloucester County
11227	Goochland County
10450	Grayson County
8741	Greene County
4512	Greensville County
17930	Halifax County
64690	Hampton city
  40	Hanover
44905	Hanover County
23028	Harrisonburg city
127608	Henrico County
29615	Henry County
2288	Highland County
9518	Hopewell city
17971	Isle of Wight County
34289	James City County
10546	King George County
4457	King William County
3959	King and Queen County
8682	Lancaster County
13248	Lee County
3029	Lexington City
117210	Loudoun County
17886	Louisa County
6749	Lunenburg County
33506	Lynchburg city
6810	Madison County
16238	Manassas city
6628	Martinsville city
6038	Mathews County
21318	Mecklenburg County
7922	Middlesex County
15483	Montgomery County
11173	Nelson County
10344	New Kent County
86460	Newport News
77063	Norfolk city
9081	Northampton County
27727	Northumberland County
7453	Nottoway County
16503	Orange County
12612	Page County
12250	Patrick County
13261	Petersburg city
32318	Pittsylvania County
4994	Poquoson city
39059	Portsmouth city
10753	Powhatan County
7244	Prince Edward County
11922	Prince George County
175819	Prince William County
18476	Pulaski County
5969	Radford city
3466	Rappahannock County
4418	Richmond County
89288	Richmond city
47025	Roanoke County
36486	Roanoke city
12817	Rockbridge County
38005	Rockingham County
15838	Russell County
12586	Salem city
13796	Scott County
22945	Shenandoah County
17412	Smyth County
9520	Southampton County
50311	Spotsylvania County
49324	Stafford County
11849	Staunton city
39696	Suffolk city
4176	Surry County
5815	Sussex County
22070	Tazewell County
208153	Virginia Beach city
16506	Warren County
28093	Washington County
9791	Waynesboro city
1515	West Point Town
11937	Westmoreland County
6607	Williamsburg city
10729	Winchester city
23519	Wise County
16061	Wythe County
33341	York County
```
Can you change the coverage key to look like this:

```json
{
    "coverage": {
        "country": "us",
        "state": "va"
    }
}
```