update lockfile to point to v0.4.0; update highlight queries

lockfile.json

@@ -78,7 +78,7 @@
     "revision": "a0c1adb59e390f7d839a146c57fdb33d36ed97e6"
   },
   "hcl": {
-    "revision": "30e9f3eae8ec798f6540b05e3b4bb6c6e1313156"
+    "revision": "88c7c031d1b1d9c5a6fa0ef1739f3bc17ffceafe"
   },
   "html": {
     "revision": "d93af487cc75120c89257195e6be46c999c6ba18"

queries/hcl/highlights.scm

@@ -54,18 +54,20 @@
 ] @conditional
 
 [
-  (string_lit)
-  (quoted_template)
-  (heredoc_template)
+  (quoted_template_start) ; "
+  (quoted_template_end); "
+  (template_literal) ; non-interpolation/directive content
 ] @string
 
-
 [
-  (heredoc_identifier)
-  (heredoc_start)
+  (heredoc_identifier) ; <<END
+  (heredoc_start) ; END
 ] @punctuation.delimiter
 
-(template_interpolation) @string.escape
+[
+  (template_interpolation_start) ; ${
+  (template_interpolation_end) ; }
+] @string.escape
 
 (numeric_lit) @number
 (bool_lit) @boolean
@@ -77,4 +79,9 @@
 (function_call (identifier) @function)
 (attribute (identifier) @field)
 
+; { key: val }
+;
+; highlight identifier keys as though they were block attributes
+(object_elem key: (expression (variable_expr (identifier) @field)))
+
 (ERROR) @error