Parse hook names from multiple modules in a bundle

* Create a HookSourceData per location key (file, line, column).
* Cache the source map per runtime URL ( = file part of location key).
* Don't store sourceMapContents - only store a consumer instance.
* Look up original source URLs in the source map correctly.
* Cache the code + AST per original URL.
* Fix off-by-one column number lookup.
* Some naming and typing tweaks related to the above.
* Stop storing the consumer outside the with() callback, which is a bug.

packages/react-devtools-extensions/src/astUtils.js

@@ -20,14 +20,6 @@ export type SourceFileASTWithHookDetails = {
   source: string,
 };
 
-export type SourceMap = {|
-  mappings: string,
-  names: Array<string>,
-  sources: Array<string>,
-  sourcesContent: Array<string>,
-  version: number,
-|};
-
 const AST_NODE_TYPES = Object.freeze({
   CALL_EXPRESSION: 'CallExpression',
   MEMBER_EXPRESSION: 'MemberExpression',