Update useragent strings in uaswitch.lua

Nobody has claimed this yet.

From @schvabodka-man:

```
plugins.uaswitch.ua_strings.fakes = {

["luakit"] = "Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/604.1 (KHTML, like Gecko) Version/11.0 Safari/604.1",
["firefox"] = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0",
["chrome"] = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36",
["chromium"] = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/58.0.3029.110 Chrome/58.0.3029.110 Safari/537.36",
["edge"] = "Mozilla/5.0 (Windows NT 6.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36 Edge/14.14393",
["ie11"] = "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko",
["opera"] = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36 OPR/46.0.2597.57",
["opera-presto"] = "Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14",
["opera-mini-j2me"] = "Opera/9.80 (J2ME/MIDP; Opera Mini/4.2/28.3590; U; en) Presto/2.8.119 Version/11.10",
["opera-mini-android"] = "Opera/9.80 (Android; Opera Mini/24.0.2254/62.178; U; en) Presto/2.12.423 Version/12.16",
["okhttp"] = "okhttp/3.8.0",
["netscape"] = "Mozilla/4.5 (compatible; HTTrack 3.0x; Windows 98)",
["netsurf"] = "NetSurf/3.6 (Linux)",
["links"] = "Links (2.7; Linux 3.10.24+ armv6l; GNU C 4.6.3; dump)",
["dillo"] = "Dillo/3.0.5",
["lynx"] = "Lynx/2.8.8pre.4 libwww-FM/2.14 SSL-MM/1.4.1 GNUTLS/2.12.23",
["safari"] = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/602.4.8 (KHTML, like Gecko) Version/10.0.3 Safari/602.4.8",
["iphone"] = "Mozilla/5.0 (iPhone; CPU iPhone OS 10_2_1 like Mac OS X) AppleWebKit/602.4.6 (KHTML, like Gecko) Version/10.0 Mobile/14D27 Safari/602.1",
["ipad"] = "Mozilla/5.0 (iPad; CPU OS 9_3_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13E238 Safari/601.1",
["android-phone"] = "Mozilla/5.0 (Linux; Android 6.0.1; Nexus 6P Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.83 Mobile Safari/537.36",
["android-tablet"] = "Mozilla/5.0 (Linux; Android 7.0; Pixel C Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/52.0.2743.98 Safari/537.36",
}
```

Depends on #14

Start with uaswitch.lua and compare its user-agent entries with the table supplied in the issue. Update the listed strings and verify that the resulting table remains valid Lua; the dependency on issue #14 should be checked before starting.

Written by the indexing model from the issue text.