updated queries

highlights.scm

(program
  (comment)?
  .
  (expression_statement
    .
    (string
      (string_fragment) @keyword.directive
        (#eq? @keyword.directive "use strict"))))
(function_declaration
  body:
    (statement_block
      (comment)?
      .
      (expression_statement
        (string
          (string_fragment) @keyword.directive
            (#eq? @keyword.directive "use strict")))))
(arrow_function
  body:
    (statement_block
      (comment)?
      .
      (expression_statement
        (string
          (string_fragment) @keyword.directive
            (#eq? @keyword.directive "use strict")))))
(function_expression
  body: (statement_block
          (comment)?
          .
          (expression_statement
            (string
              (string_fragment) @keyword.directive
                (#eq? @keyword.directive "use strict")))))