Add detect Opera Developer (#104)

Author: YevhenPolovnyi

src/index.ts

@@ -108,7 +108,7 @@ const userAgentRules: UserAgentRule[] = [
   ['fxios', /FxiOS\/([0-9\.]+)/],
   ['opera-mini', /Opera Mini.*Version\/([0-9\.]+)/],
   ['opera', /Opera\/([0-9\.]+)(?:\s|$)/],
-  ['opera', /OPR\/([0-9\.]+)(:?\s|$)$/],
+  ['opera', /OPR\/([0-9\.]+)(:?\s|$)/],
   ['ie', /Trident\/7\.0.*rv\:([0-9\.]+).*\).*Gecko$/],
   ['ie', /MSIE\s([0-9\.]+);.*Trident\/[4-7].0/],
   ['ie', /MSIE\s(7\.0)/],

test/logic.js

@@ -115,6 +115,11 @@ test('detects Opera', function(t) {
     { name: 'opera', version: '38.0.2220', os: 'Mac OS' }
   );
 
+  assertAgentString(t,
+      'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.28 Safari/537.36 OPR/61.0.3282.0 (Edition developer)',
+      { name: 'opera', version: '61.0.3282', os: 'Mac OS' }
+  );
+
   t.end();
 });