Adds new core package as replacement of jscodeshift

Author: Daniel Del Core

.changeset/chilly-panthers-sort.md

@@ -0,0 +1,5 @@
+---
+'@codeshift/core': patch
+---
+
+Inital release of @codeshift/core which is a partial fork of JSCodeshift.

.changeset/hungry-waves-learn.md

@@ -0,0 +1,11 @@
+---
+'@codeshift/cli': patch
+'@codeshift/fetcher': patch
+'@codeshift/initializer': patch
+'@codeshift/test-utils': patch
+'@codeshift/types': patch
+'@codeshift/utils': patch
+'@codeshift/validator': patch
+---
+
+Packages are now built with pareljs. Entrypoints have been updated to match

.changeset/pretty-bees-punch.md

@@ -0,0 +1,26 @@
+---
+'@codeshift/mod-atlaskit__avatar': minor
+'@codeshift/mod-atlaskit__breadcrumbs': minor
+'@codeshift/mod-atlaskit__button': minor
+'@codeshift/mod-atlaskit__calendar': minor
+'@codeshift/mod-atlaskit__checkbox': minor
+'@codeshift/mod-atlaskit__icon': minor
+'@codeshift/mod-atlaskit__menu': minor
+'@codeshift/mod-atlaskit__popper': minor
+'@codeshift/mod-atlaskit__popup': minor
+'@codeshift/mod-atlaskit__progress-indicator': minor
+'@codeshift/mod-atlaskit__range': minor
+'@codeshift/mod-atlaskit__section-message': minor
+'@codeshift/mod-atlaskit__side-navigation': minor
+'@codeshift/mod-atlaskit__spinner': minor
+'@codeshift/mod-atlaskit__tag': minor
+'@codeshift/mod-atlaskit__textarea': minor
+'@codeshift/mod-atlaskit__textfield': minor
+'@codeshift/mod-atlaskit__toggle': minor
+'@codeshift/mod-emotion__monorepo': minor
+'@codeshift/mod-javascript': minor
+'@codeshift/mod-memoize-one': minor
+'@codeshift/mod-react': minor
+---
+
+Community codeshift packages are now built via parcel and managed via changesets

community/javascript/src/var-to-let/transform.ts

@@ -7,7 +7,6 @@ export default function transformer(
 ) {
   const source = j(file.source);
 
-  // remove all "use strict" statements
   source.find(j.VariableDeclaration, { kind: 'var' }).forEach(p => {
     const letStatement = j.variableDeclaration('let', p.value.declarations);
     letStatement.comments = p.value.comments;