chore(release): Publish next

 - gatsby-plugin-google-tagmanager@5.13.0-next.2
 - gatsby-source-contentful@8.13.0-next.3
 - gatsby@5.13.0-next.3

Author: pieh

packages/gatsby-plugin-google-tagmanager/package.json

@@ -1,7 +1,7 @@
 {
   "name": "gatsby-plugin-google-tagmanager",
   "description": "Gatsby plugin to add google tagmanager onto a site",
-  "version": "5.13.0-next.1",
+  "version": "5.13.0-next.2",
   "author": "Thijs Koerselman <thijs@vauxlab.com>",
   "bugs": {
     "url": "https://github.com/gatsbyjs/gatsby/issues"

packages/gatsby-source-contentful/package.json

@@ -1,7 +1,7 @@
 {
   "name": "gatsby-source-contentful",
   "description": "Gatsby source plugin for building websites using the Contentful CMS as a data source",
-  "version": "8.13.0-next.2",
+  "version": "8.13.0-next.3",
   "author": "Marcus Ericsson <mericsson@gmail.com> (mericsson.com)",
   "bugs": {
     "url": "https://github.com/gatsbyjs/gatsby/issues"

packages/gatsby/package.json

@@ -1,7 +1,7 @@
 {
   "name": "gatsby",
   "description": "Blazing fast modern site generator for React",
-  "version": "5.13.0-next.2",
+  "version": "5.13.0-next.3",
   "author": "Kyle Mathews <mathews.kyle@gmail.com>",
   "bin": {
     "gatsby": "./cli.js"