Updated PHP version matrix in README

Author: ezimuel

README.md

@@ -70,20 +70,20 @@ Features
 Version Matrix
 --------------
 
-| Elasticsearch Version | Elasticsearch-PHP Branch |
-| --------------------- | ------------------------ |
-| >= 7.x                | 7.x                      |
-| >= 6.6, < 7.0         | 6.7.x                    |
-| >= 6.0, < 6.6         | 6.5.x                    |
-| >= 5.0, < 6.0         | 5.0                      |
-| >= 2.0, < 5.0         | 1.0 or 2.0               |
-| >= 1.0, < 2.0         | 1.0 or 2.0               |
-| <= 0.90.x             | 0.4                      |
-
- - If you are using Elasticsearch 7.x you can use Elasticsearch-PHP 7.x branch
- - If you are using Elasticsearch 6.6 to 6.7, use Elasticsearch-PHP 6.7.x branch.
- - If you are using Elasticsearch 6.0 to 6.5, use Elasticsearch-PHP 6.5.x branch.
- - If you are using Elasticsearch 5.x, use Elasticsearch-PHP 5.0 branch.
+| Elasticsearch-PHP Branch | PHP Version |
+| ----------- | ------------------------ |
+| >= 7.16.0, < 8.0.0  | >= 7.3.0, <= 8.1.99 |
+| >= 7.12.0, < 8.0.0  | >= 7.3.0, <= 8.0.99 |
+| >= 7.11.0, < 8.0.0  | >= 7.1.0, <= 8.0.99 |
+| >= 7.0.0,  < 7.11.0 | >= 7.1.0, < 8.0.0 |
+| 6.x         | >= 7.0.0, < 8.0.0        |
+| 5.x         | >= 5.6.6, < 8.0.0        |
+| 2.x         | >= 5.4.0, < 7.0.0        |
+| 0.4, 1.x    | >= 5.3.9, < 7.0.0        |
+
+ - If you are using Elasticsearch 7.x, you can use Elasticsearch-PHP 7.x branch.
+ - If you are using Elasticsearch 6.x, you can use Elasticsearch-PHP 6.x branch.
+ - If you are using Elasticsearch 5.x, you can use Elasticsearch-PHP 6.x branch.
  - If you are using Elasticsearch 1.x or 2.x, prefer using the Elasticsearch-PHP 2.0 branch.  The 1.0 branch is compatible however.
  - If you are using a version older than 1.0, you must install the `0.4` Elasticsearch-PHP branch. Since ES 0.90.x and below is now EOL, the corresponding `0.4` branch will not receive any more development or bugfixes.  Please upgrade.
  - You should never use Elasticsearch-PHP Master branch, as it tracks Elasticsearch master and may contain incomplete features or breaks in backwards compatibility. Only use ES-PHP master if you are developing against ES master for some reason.