Update specs with new behavior from Dart Sass's master branch (#1415)

Author: nex3

spec/basic/60_call.hrx

@@ -39,7 +39,7 @@ in Sass 4.0. Use call(function-reference(max)) instead.
 
 <===> warning-dart-sass
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function(foobar)) instead.
+in Dart Sass 2.0.0. Use call(get-function(foobar)) instead.
 
    ,
 11 |   display: call(foobar); 
@@ -48,7 +48,7 @@ in Sass 4.0. Use call(get-function(foobar)) instead.
     input.scss 11:12  root stylesheet
 
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function(min)) instead.
+in Dart Sass 2.0.0. Use call(get-function(min)) instead.
 
    ,
 12 |   display: call(min, 1,3,5,7);
@@ -57,7 +57,7 @@ in Sass 4.0. Use call(get-function(min)) instead.
     input.scss 12:12  root stylesheet
 
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function(min)) instead.
+in Dart Sass 2.0.0. Use call(get-function(min)) instead.
 
    ,
 13 |   display: call(min, 5);
@@ -66,7 +66,7 @@ in Sass 4.0. Use call(get-function(min)) instead.
     input.scss 13:12  root stylesheet
 
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function(max)) instead.
+in Dart Sass 2.0.0. Use call(get-function(max)) instead.
 
    ,
 14 |   display: call(max, 10,3,5,7);

spec/libsass-closed-issues/issue_1075.hrx

@@ -16,7 +16,7 @@ in Sass 4.0. Use call(function-reference(lighten)) instead.
 
 <===> warning-dart-sass
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function("lighten")) instead.
+in Dart Sass 2.0.0. Use call(get-function("lighten")) instead.
 
   ,
 4 |   bar: call($name, $args...);

spec/libsass-closed-issues/issue_1081.hrx

@@ -45,7 +45,8 @@ after import-after {
 
 <===> warning
 DEPRECATION WARNING: As of Dart Sass 2.0.0, !global assignments won't be able to
-declare new variables. Consider adding `$foo: null` at the top level.
+declare new variables. Since this assignment is at the root of the stylesheet,
+the !global flag is unnecessary and can safely be removed.
 
   ,
 1 | $foo: foo !global !default;

spec/libsass-closed-issues/issue_1133/normal.hrx

@@ -34,7 +34,7 @@ in Sass 4.0. Use call(function-reference(foo)) instead.
 
 <===> warning-dart-sass
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function("foo")) instead.
+in Dart Sass 2.0.0. Use call(get-function("foo")) instead.
 
    ,
 13 |     $map: call("foo", (this: is, my: map));

spec/libsass-closed-issues/issue_1133/vararg.hrx

@@ -34,7 +34,7 @@ in Sass 4.0. Use call(function-reference(foo)) instead.
 
 <===> warning-dart-sass
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function("foo")) instead.
+in Dart Sass 2.0.0. Use call(get-function("foo")) instead.
 
    ,
 13 |   $map: call("foo", (this: is, my: map)...);

spec/libsass-closed-issues/issue_1266/max.hrx

@@ -14,7 +14,7 @@ Error: "blah" is not a number for `max'
 
 <===> error-dart-sass
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function(max)) instead.
+in Dart Sass 2.0.0. Use call(get-function(max)) instead.
 
   ,
 3 |   bar: call(max, $foo...);

spec/libsass-closed-issues/issue_1266/min.hrx

@@ -14,7 +14,7 @@ Error: "blah" is not a number for `min'
 
 <===> error-dart-sass
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function(min)) instead.
+in Dart Sass 2.0.0. Use call(get-function(min)) instead.
 
   ,
 3 |   bar: call(min, $foo...);

spec/libsass-closed-issues/issue_1305.hrx

@@ -14,7 +14,7 @@ in Sass 4.0. Use call(function-reference(unquote)) instead.
 
 <===> warning-dart-sass
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function("unquote")) instead.
+in Dart Sass 2.0.0. Use call(get-function("unquote")) instead.
 
   ,
 2 |     content: call('unquote', 'foo', ()...);

spec/libsass-closed-issues/issue_1417.hrx

@@ -35,7 +35,7 @@ in Sass 4.0. Use call(function-reference(missing)) instead.
 
 <===> warning-dart-sass
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function(missing)) instead.
+in Dart Sass 2.0.0. Use call(get-function(missing)) instead.
 
   ,
 10|   foo: call(missing, 1px / 2px, 1px / round(1.5));

spec/libsass-closed-issues/issue_1418/dynamic.hrx

@@ -23,7 +23,7 @@ Error: Plain CSS function missing doesn't support keyword arguments
 
 <===> error-dart-sass
 DEPRECATION WARNING: Passing a string to call() is deprecated and will be illegal
-in Sass 4.0. Use call(get-function(missing)) instead.
+in Dart Sass 2.0.0. Use call(get-function(missing)) instead.
 
   ,
 2 |     color: call(missing, $a: b);