QL: Fix bad string grammar

What was there before made it so that you couldn't actually extract the
contents of a string.

ql/extractor/Cargo.toml

@@ -14,7 +14,7 @@ tree-sitter-ql = { git = "https://github.com/tree-sitter/tree-sitter-ql.git", re
 tree-sitter-ql-dbscheme = { git = "https://github.com/erik-krogh/tree-sitter-ql-dbscheme.git", rev = "63e1344353f63931e88bfbc2faa2e78e1421b213"}
 tree-sitter-ql-yaml = {git = "https://github.com/erik-krogh/tree-sitter-ql.git", rev = "cf704bf3671e1ae148e173464fb65a4d2bbf5f99"}
 tree-sitter-blame = {path = "../buramu/tree-sitter-blame"}
-tree-sitter-json = {git = "https://github.com/tausbn/tree-sitter-json.git", rev = "471ceac44d127e609afa349cf0a59370791fe8b3"}
+tree-sitter-json = {git = "https://github.com/tausbn/tree-sitter-json.git", rev = "ea1f655604c32c2f76aad2abed2498a56d81f3a9"}
 clap = "2.33"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3.16", features = ["env-filter"] }

ql/generator/Cargo.toml

@@ -15,4 +15,4 @@ tree-sitter-ql = { git = "https://github.com/tree-sitter/tree-sitter-ql.git", re
 tree-sitter-ql-dbscheme = { git = "https://github.com/erik-krogh/tree-sitter-ql-dbscheme.git", rev = "63e1344353f63931e88bfbc2faa2e78e1421b213"}
 tree-sitter-ql-yaml = {git = "https://github.com/erik-krogh/tree-sitter-ql.git", rev = "cf704bf3671e1ae148e173464fb65a4d2bbf5f99"}
 tree-sitter-blame = {path = "../buramu/tree-sitter-blame"}
-tree-sitter-json = { git = "https://github.com/tausbn/tree-sitter-json.git", rev = "471ceac44d127e609afa349cf0a59370791fe8b3"}
+tree-sitter-json = { git = "https://github.com/tausbn/tree-sitter-json.git", rev = "ea1f655604c32c2f76aad2abed2498a56d81f3a9"}

ql/ql/src/codeql_ql/ast/internal/TreeSitter.qll

@@ -1930,12 +1930,6 @@ module JSON {
     final override AstNode getAFieldOrChild() { json_document_child(this, _, result) }
   }
 
-  /** A class representing `escape_sequence` tokens. */
-  class EscapeSequence extends @json_token_escape_sequence, Token {
-    /** Gets the name of the primary QL class for this element. */
-    final override string getAPrimaryQlClass() { result = "EscapeSequence" }
-  }
-
   /** A class representing `false` tokens. */
   class False extends @json_token_false, Token {
     /** Gets the name of the primary QL class for this element. */
@@ -1995,16 +1989,10 @@ module JSON {
     final override AstNode getAFieldOrChild() { json_string_child(this, result) }
   }
 
-  /** A class representing `string_content` nodes. */
+  /** A class representing `string_content` tokens. */
-  class StringContent extends @json_string_content, AstNode {
+  class StringContent extends @json_token_string_content, Token {
     /** Gets the name of the primary QL class for this element. */
     final override string getAPrimaryQlClass() { result = "StringContent" }
-
-    /** Gets the `i`th child of this node. */
-    final EscapeSequence getChild(int i) { json_string_content_child(this, i, result) }
-
-    /** Gets a field or child node of this node. */
-    final override AstNode getAFieldOrChild() { json_string_content_child(this, _, result) }
   }
 
   /** A class representing `true` tokens. */

ql/ql/src/ql.dbscheme

@@ -1292,24 +1292,13 @@ json_pair_def(
 
 json_string_child(
   unique int json_string__: @json_string__ ref,
-  unique int child: @json_string_content ref
+  unique int child: @json_token_string_content ref
 );
 
 json_string_def(
   unique int id: @json_string__
 );
 
-#keyset[json_string_content, index]
-json_string_content_child(
-  int json_string_content: @json_string_content ref,
-  int index: int ref,
-  unique int child: @json_token_escape_sequence ref
-);
-
-json_string_content_def(
-  unique int id: @json_string_content
-);
-
 @json_value = @json_array | @json_object | @json_string__ | @json_token_false | @json_token_null | @json_token_number | @json_token_true
 
 json_tokeninfo(
@@ -1321,15 +1310,15 @@ json_tokeninfo(
 case @json_token.kind of
   0 = @json_reserved_word
 | 1 = @json_token_comment
-| 2 = @json_token_escape_sequence
+| 2 = @json_token_false
-| 3 = @json_token_false
+| 3 = @json_token_null
-| 4 = @json_token_null
+| 4 = @json_token_number
-| 5 = @json_token_number
+| 5 = @json_token_string_content
 | 6 = @json_token_true
 ;
 
 
-@json_ast_node = @json_array | @json_document | @json_object | @json_pair | @json_string__ | @json_string_content | @json_token
+@json_ast_node = @json_array | @json_document | @json_object | @json_pair | @json_string__ | @json_token
 
 @json_ast_node_parent = @file | @json_ast_node