[breaking] Bump minimum React version to 16.8

Author: wojtekmaj

package.json

@@ -64,8 +64,8 @@
     "rimraf": "^3.0.0"
   },
   "peerDependencies": {
-    "react": "^16.3.0 || ^17.0.0 || ^18.0.0",
-    "react-dom": "^16.3.0 || ^17.0.0 || ^18.0.0"
+    "react": "^16.8.0 || ^17.0.0 || ^18.0.0",
+    "react-dom": "^16.8.0 || ^17.0.0 || ^18.0.0"
   },
   "resolutions": {
     "semver@7.0.0": "^7.0.0"

test/yarn.lock

@@ -1921,8 +1921,8 @@ __metadata:
     react-datetime-picker: ^3.5.0
     react-fit: ^1.4.0
   peerDependencies:
-    react: ^16.3.0 || ^17.0.0 || ^18.0.0
-    react-dom: ^16.3.0 || ^17.0.0 || ^18.0.0
+    react: ^16.8.0 || ^17.0.0 || ^18.0.0
+    react-dom: ^16.8.0 || ^17.0.0 || ^18.0.0
   languageName: node
   linkType: soft
 

yarn.lock

@@ -2113,8 +2113,8 @@ __metadata:
     react-fit: ^1.4.0
     rimraf: ^3.0.0
   peerDependencies:
-    react: ^16.3.0 || ^17.0.0 || ^18.0.0
-    react-dom: ^16.3.0 || ^17.0.0 || ^18.0.0
+    react: ^16.8.0 || ^17.0.0 || ^18.0.0
+    react-dom: ^16.8.0 || ^17.0.0 || ^18.0.0
   languageName: unknown
   linkType: soft