Add test cases for bitwise shift operators

Author: kborowinski

spec/testfiles/syntax_test_TheBigTestFile.ps1

@@ -1004,6 +1004,14 @@ $x = $y -band $x
 $z = -bnot $x
 #  ^ keyword.operator.assignment.powershell
 #    ^ keyword.operator.bitwise.powershell
+$l = 1 -shl 10
+#  ^ keyword.operator.assignment.powershell
+#    ^      ^^ constant.numeric.integer.powershell
+#       ^ keyword.operator.bitwise.powershell
+$r = 10 -shr 1
+#  ^ keyword.operator.assignment.powershell
+#    ^^      ^ constant.numeric.integer.powershell
+#        ^ keyword.operator.bitwise.powershell
 $k = $y -xor $b
 #  ^ keyword.operator.assignment.powershell
 #       ^ keyword.operator.logical.powershell