Jest serializer new api (emotion-js#1901)

* Remove redundant isTransformed checks

* Move cache.add closer to printer call

* Drop separate test/print exports from @emotion/jest

* Refactor serializers to use new plugin API

* Use stylis to parse & prettify css in @emotion/jest

* Add @emotion/css-prettifier package

* One CSS parser to rule them all

* Allow to customize indentation in @emotion/css-prettifier

* Fix flow errors

* Remove print & test from TS @emotion/jest tests

* Add changesets

* Tweak changeset

* Update .changeset/breezy-carpets-smile.md

Co-authored-by: Mitchell Hamilton <mitchell@hamil.town>

* Remove @emotion/stylis references

Co-authored-by: Mitchell Hamilton <mitchell@hamil.town>

.changeset/breezy-carpets-smile.md

@@ -0,0 +1,5 @@
+---
+'@emotion/jest': major
+---
+
+`test` & `print` are no longer exported as named exports. If you want to access the default serializer just access the default export. This means that `@emotion/jest`(previously `jest-emotion`) can't be used directly in the `snapshotSerializers` option, you should use `@emotion/jest/serializer` instead for this.

.changeset/famous-bats-grow.md

@@ -0,0 +1,5 @@
+---
+'@emotion/jest': minor
+---
+
+Improved printing of nested at-rules.

.changeset/nervous-nails-develop.md

@@ -0,0 +1,5 @@
+---
+'@emotion/jest': major
+---
+
+Refactored to use new serializers API which has been introduced in Jest 21.

.changeset/odd-poems-sort.md

@@ -0,0 +1,5 @@
+---
+'@emotion/jest': minor
+---
+
+Fixed an issue with all styles being recognized as changed in Jest 25 on unrelated changed.

.changeset/pre.json

@@ -42,7 +42,8 @@
     "@emotion/eslint-plugin": "10.0.14",
     "@emotion/jest": "11.0.0-next.7",
     "@emotion/react": "11.0.0-next.7",
-    "@emotion/server": "11.0.0-next.0"
+    "@emotion/server": "11.0.0-next.0",
+    "@emotion/css-prettifier": "1.0.0-next.0"
   },
   "changesets": [
     "angry-cheetahs-march",