chore: revert node 10.22.1 as minimum version

Minimum node version required for using the plugin is still 10.12 but it
was up to 10.22.1 because of a dev dependency. This won't affect usages
of the plugin so I'm reverting it.
More details here: #234

.github/workflows/pipeline.yml

@@ -53,8 +53,8 @@ jobs:
 
     strategy:
       matrix:
-        node: [ '10.22.1', '10', '12', '14' ]
-        eslint: [ '7.5', '7', ]
+        node: [ 10.12, 10, 12, 14 ]
+        eslint: [ 7.5, 7 ]
 
     steps:
       - name: Cancel Previous Runs

docs/migrating-to-v4-guide.md

@@ -26,10 +26,10 @@ One of the most important changes of `eslint-plugin-testing-library` v4 is the n
 
 ### Dependencies
 
-- Min Node version required is `10.22.1`
 - Min ESLint version required is `7.5`
+- Min Node version required didn't change (`10.12`)
 
-Make sure you have Node and ESLint installed satisfying these new required versions.
+Please make sure you have Node and ESLint installed satisfying these required versions.
 
 ### New errors reported
 

package.json

@@ -70,7 +70,7 @@
     "eslint": "^7.5.0"
   },
   "engines": {
-    "node": "^10.22.1 || >=12.0.0",
+    "node": "^10.12.0 || >=12.0.0",
     "npm": ">=6"
   },
   "license": "MIT"