Work around pipelineOperator issue in recast (quick fix).

Author: Robert Jackson

src/transform-support.js

@@ -2,7 +2,22 @@
 
 function getJSCodeshiftParser(api) {
   try {
-    let parser = require('recast/parsers/typescript');
+    // this is bad, but works around a bug in recent @babel/parser versions:
+    let babelParser = require('@babel/parser');
+    let parser = {
+      parse(source, _options) {
+        let options = require('recast/parsers/_babylon_options')(_options);
+        options.plugins = options.plugins.filter(plugin => plugin !== 'pipelineOperator');
+        options.plugins.push(['pipelineOperator', { proposal: 'minimal' }]);
+        options.plugins.push('typescript');
+
+        return babelParser.parse(source, options);
+      },
+    };
+
+    // the above should be replace with the following (once
+    // https://github.com/benjamn/recast/pull/521 lands in a release):
+    // let parser = require('recast/parsers/typescript');
 
     return api.jscodeshift.withParser(parser);
   } catch (e) {