Added support for record and tuple syntax. (#10865)

* Added support for record and tuple syntax.

This commit adds support for both the hash #{} and bar {||}
syntaxes to babel-parser, as well as adds the supporting
babel-plugin-syntax-record-and-tuple plugin to enable support
for the syntax. Does not include any transform for records and
tuples.

* typo

* added check to ensure recordAndTuple in babel-parser

* switched to syntaxType option instead of explicit entries for each record and tuple type

* switched to using recordAndTupleSyntaxType for generator options instead of adding to node

* added tests for generator option recordAndTupleSyntaxType

* added test for record and tuple bar syntax with flow typings

* added tests for invalid/missing recordAndTuple syntaxType parser option

* fixed flowcheck errors

* fix merge with class privates in tokenizer

* Update packages/babel-parser/src/types.js

Co-Authored-By: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>

* improved recordAndTuple generator error message, added tests for invalid,missing options

* updated error messages for invalid parser syntaxType option

* updated error message

* added better error messages for when the recordAndTuple syntaxType is doesn't match the syntax used

* updated record and tuple support to use new error message templates

* added recordAndTuple to missing plugin helpers

* Fix linting

Co-authored-by: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>

packages/babel-parser/ast/spec.md

@@ -58,6 +58,8 @@ These are the core @babel/parser (babylon) AST node types.
     - [ObjectMember](#objectmember)
       - [ObjectProperty](#objectproperty)
       - [ObjectMethod](#objectmethod)
+  - [RecordExpression](#recordexpression)
+  - [TupleExpression](#tupleexpression)
   - [FunctionExpression](#functionexpression)
   - [Unary operations](#unary-operations)
     - [UnaryExpression](#unaryexpression)
@@ -719,6 +721,24 @@ interface ObjectMethod <: ObjectMember, Function {
 }
 ```
 
+## RecordExpression
+
+```js
+interface RecordExpression <: Expression {
+  type: "RecordExpression";
+  properties: [ ObjectProperty | ObjectMethod | SpreadElement ];
+}
+```
+
+## TupleExpression
+
+```js
+interface TupleExpression <: Expression {
+  type: "TupleExpression";
+  elements: [ Expression | SpreadElement | null ];
+}
+```
+
 ## FunctionExpression
 
 ```js