chore: update peerdeps to latest major versions (#29857)

Author: wardpeet

packages/gatsby-plugin-gatsby-cloud/package.json

@@ -29,7 +29,7 @@
   "license": "MIT",
   "main": "index.js",
   "peerDependencies": {
-    "gatsby": "^3.0.0"
+    "gatsby": "^3.0.0-next.0"
   },
   "repository": {
     "type": "git",

packages/gatsby-plugin-sharp/package.json

@@ -47,7 +47,7 @@
   "license": "MIT",
   "main": "index.js",
   "peerDependencies": {
-    "gatsby": ">2.0.15"
+    "gatsby": "^3.0.0-next.0"
   },
   "repository": {
     "type": "git",

packages/gatsby-remark-embed-snippet/package.json

@@ -27,7 +27,7 @@
   ],
   "peerDependencies": {
     "gatsby": "^3.0.0-next.0",
-    "gatsby-remark-prismjs": "^3.0.0"
+    "gatsby-remark-prismjs": "^3.0.0-next.0"
   },
   "license": "MIT",
   "main": "index.js",

packages/gatsby-remark-images/package.json

@@ -41,7 +41,7 @@
   "main": "index.js",
   "peerDependencies": {
     "gatsby": "^3.0.0-next.0",
-    "gatsby-plugin-sharp": "^2.0.0-beta.5"
+    "gatsby-plugin-sharp": "^3.0.0-next.0"
   },
   "repository": {
     "type": "git",

packages/gatsby-source-contentful/package.json

@@ -45,7 +45,7 @@
   "license": "MIT",
   "peerDependencies": {
     "gatsby": "^3.0.0-next.0",
-    "gatsby-plugin-sharp": "^2.6.14",
+    "gatsby-plugin-sharp": "^3.0.0-next.0",
     "sharp": "^0.26.0"
   },
   "repository": {

packages/gatsby-source-wordpress/package.json

@@ -73,8 +73,8 @@
   "license": "MIT",
   "peerDependencies": {
     "gatsby": "^3.0.0-next.0",
-    "gatsby-plugin-sharp": "^2.6.8",
-    "gatsby-transformer-sharp": "^2.5.10"
+    "gatsby-plugin-sharp": "^3.0.0-next.0",
+    "gatsby-transformer-sharp": "^3.0.0-next.0"
   },
   "repository": {
     "type": "git",

packages/gatsby-transformer-javascript-frontmatter/package.json

@@ -24,7 +24,7 @@
   "license": "MIT",
   "peerDependencies": {
     "gatsby": "^3.0.0-next.0",
-    "gatsby-source-filesystem": "^2.0.3"
+    "gatsby-source-filesystem": "^3.0.0-next.0"
   },
   "repository": {
     "type": "git",

packages/gatsby-transformer-sharp/package.json

@@ -33,7 +33,7 @@
   "license": "MIT",
   "peerDependencies": {
     "gatsby": "^3.0.0-next.0",
-    "gatsby-plugin-sharp": "^2.0.0-beta.3"
+    "gatsby-plugin-sharp": "^3.0.0-next.0"
   },
   "repository": {
     "type": "git",

packages/gatsby-transformer-sqip/package.json

@@ -24,8 +24,8 @@
   },
   "peerDependencies": {
     "gatsby": "^3.0.0-next.0",
-    "gatsby-source-contentful": "^2.0.0",
-    "gatsby-transformer-sharp": "^2.0.0"
+    "gatsby-source-contentful": "^5.0.0-next.0",
+    "gatsby-transformer-sharp": "^3.0.0-next.0"
   },
   "homepage": "https://github.com/gatsbyjs/gatsby/tree/master/packages/gatsby-transformer-sqip#readme",
   "keywords": [