Add expect(...).toBe(...) snippet for Jasmine

UltiSnips/javascript_jasmine.snippets

@@ -50,6 +50,10 @@ snippet ee "expect to equal (js)" b
 expect(${1:target}).toEqual(${2:value});
 endsnippet
 
+snippet eb "expect to be (js)" b
+expect(${1:target}).toBe(${2:value});
+endsnippet
+
 snippet em "expect to match (js)" b
 expect(${1:target}).toMatch(${2:pattern});
 endsnippet