Add PhantomJS (#98)

fixes #81

Signed-off-by: Kayabe <lorenzoanonim@yahoo.com>

Author: kayabe

all_test.go

@@ -476,6 +476,11 @@ var uastrings = []struct {
 		ua:       "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/92.0.4515.107 Safari/537.36",
 		expected: "Mozilla:5.0 Platform:X11 OS:Linux x86_64 Browser:Headless Chrome-92.0.4515.107 Engine:AppleWebKit-537.36 Bot:false Mobile:false",
 	},
+	{
+		title:    "PhantomJS",
+		ua:       "Mozilla/5.0 (Unknown; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) PhantomJS/2.1.1 Safari/538.1",
+		expected: "Mozilla:5.0 Platform:Unknown OS:Linux x86_64 Browser:PhantomJS-2.1.1 Engine:AppleWebKit-538.1 Bot:false Mobile:false",
+	},
 	{
 		title:    "SafariMac",
 		ua:       "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16",

browser.go

@@ -101,6 +101,9 @@ func (p *UserAgent) detectBrowser(sections []section) {
 						case "DuckDuckGo":
 							p.browser.Name = "DuckDuckGo"
 							p.browser.Version = sections[slen-2].version
+						case "PhantomJS":
+							p.browser.Name = "PhantomJS"
+							p.browser.Version = sections[slen-2].version
 						default:
 							switch sections[sectionIndex].name {
 							case "Chrome", "CriOS":