Renames Quasi literal to Template literal

  - Renamed literal-quasi definition to literal-string-template
  - Renamed all occurences of quasi in scopes to template
  - Added test cases

scope name changes:

entity.template.tag.name.js
  -> entity.name.function.template.tag.js
  // tags are functions, update the scope to reflect
  // that allows for function name highlighting

punctuation.template.element.begin.js
  -> punctuation.template.expression.begin.js
  // Changed to 'expression' since that's what they are

entity.template.element.js
  -> template.expression.embedded.js
  // the whole area is an embedded expression, but I'm
  // not quite sure on the whole name of the scope here

punctuation.template.element.end.js
  -> punctuation.template.expression.end.js
  // Changed to 'expression' since that's what they are

Author: mrusselltombras

JavaScript/JavaScript.sublime-syntax

@@ -74,7 +74,7 @@ contexts:
     - include: literal-prototype
     - include: literal-regexp
     - include: literal-number
-    - include: literal-quasi
+    - include: literal-string-template
     - include: literal-string
     - include: literal-language-constant
     - include: literal-language-variable
@@ -778,26 +778,26 @@ contexts:
       scope: punctuation.terminator.statement.js
     - match: ","
       scope: meta.delimiter.comma.js
-  literal-quasi:
+  literal-string-template:
     - match: '([a-zA-Z$_][\w$_]*)?(`)'
       captures:
-        1: entity.quasi.tag.name.js
-        2: punctuation.definition.quasi.begin.js
+        1: entity.name.function.template.tag.js
+        2: punctuation.definition.template.begin.js
       push:
-        - meta_scope: string.quasi.js
+        - meta_scope: string.template.js
         - match: "`"
           captures:
-            0: punctuation.definition.quasi.end.js
+            0: punctuation.definition.template.end.js
           pop: true
         - include: string-content
         - match: '\${'
           captures:
-            0: punctuation.quasi.element.begin.js
+            0: punctuation.template.expression.begin.js
           push:
-            - meta_scope: entity.quasi.element.js
+            - meta_scope: template.expression.embedded.js
             - match: "}"
               captures:
-                0: punctuation.quasi.element.end.js
+                0: punctuation.template.expression.end.js
               pop: true
             - include: expression
   literal-regexp:

JavaScript/syntax_test_js.js

@@ -33,6 +33,18 @@ var str2 = 0;
 //   ^ variable.other.readwrite
 //       ^ keyword.operator.assignment
 
+tag`Hello ${ a + b } world\nanother ${expression}.`;
+// <- entity.name.function.template.tag.js
+// ^ punctuation.definition.template.begin.js
+//   ^ string.template.js
+//        ^ punctuation.template.expression.begin.js
+//           ^ variable.other.readwrite.js
+//             ^ keyword.operator.arithmetic.js
+//               ^ template.expression.embedded.js
+//                 ^ punctuation.template.expression.end.js
+//                        ^ constant.character.escape.js
+//                                                ^ punctuation.definition.template.end.js
+
 var obj = {
     key: bar,
     // <- meta.object-literal.key