[babel 8] Use the JSX automatic runtime by default (#12630)

Co-authored-by: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>
Co-authored-by: Arun Kumar Mohan <arunmohandm@gmail.com>

packages/babel-plugin-transform-react-jsx/test/fixtures/react/honor-custom-jsx-comment-if-jsx-pragma-option-set/options.json

@@ -1,3 +1,3 @@
 {
-  "plugins": [["transform-react-jsx", { "pragma": "foo.bar" }]]
+  "plugins": [["transform-react-jsx", { "pragma": "foo.bar", "runtime": "classic" }]]
 }

packages/babel-plugin-transform-react-jsx/test/fixtures/react/honor-custom-jsx-pragma-option/options.json

@@ -1,3 +1,3 @@
 {
-  "plugins": [["transform-react-jsx", { "pragma": "dom" }]]
+  "plugins": [["transform-react-jsx", { "pragma": "dom", "runtime": "classic" }]]
 }

packages/babel-plugin-transform-react-jsx/test/fixtures/react/options.json

@@ -2,7 +2,7 @@
   "plugins": [
     "external-helpers",
     "syntax-jsx",
-    "transform-react-jsx",
+    ["transform-react-jsx", { "runtime": "classic" }],
     "transform-arrow-functions"
   ]
 }

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-add-quotes-es3/options.json

@@ -1,3 +1,6 @@
 {
-  "plugins": ["transform-react-jsx", "transform-property-literals"]
+  "plugins": [
+    ["transform-react-jsx", { "runtime": "classic" }],
+    "transform-property-literals"
+  ]
 }

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-support-xml-namespaces-if-flag/options.json

@@ -4,6 +4,7 @@
       "transform-react-jsx",
       {
         "pragma": "h",
+        "runtime": "classic",
         "throwIfNamespace": false
       }
     ]

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-throw-error-namespaces-if-not-flag/options.json

@@ -4,6 +4,7 @@
       "transform-react-jsx",
       {
         "pragma": "h",
+        "runtime": "classic",
         "throwIfNamespace": true
       }
     ]