[Enhancement] Support MMCV < 1.8.0 (#1508)

* [Enhancement] Support MMCV < 1.8.0

* update

Author: gaotongxiao

docs/en/install.md

@@ -214,7 +214,7 @@ MMOCR has different version requirements on MMCV and MMDetection at each release
 
 | MMOCR        | MMCV                     | MMDetection                 |
 | ------------ | ------------------------ | --------------------------- |
-| main         | 1.3.8 \<= mmcv \<= 1.7.0 | 2.21.0 \<= mmdet \<= 3.0.0  |
+| main         | 1.3.8 \<= mmcv \< 1.8.0  | 2.21.0 \<= mmdet \<= 3.0.0  |
 | 0.6.1, 0.6.2 | 1.3.8 \<= mmcv \<= 1.7.0 | 2.21.0 \<= mmdet \<= 3.0.0  |
 | 0.6.0        | 1.3.8 \<= mmcv \<= 1.6.0 | 2.21.0 \<= mmdet \<= 3.0.0  |
 | 0.5.0        | 1.3.8 \<= mmcv \<= 1.5.0 | 2.14.0 \<= mmdet \<= 3.0.0  |

mmocr/__init__.py

@@ -47,7 +47,7 @@ def digit_version(version_str: str, length: int = 4):
 
 
 mmcv_minimum_version = '1.3.8'
-mmcv_maximum_version = '1.7.0'
+mmcv_maximum_version = '1.8.0'
 mmcv_version = digit_version(mmcv.__version__)
 
 assert (mmcv_version >= digit_version(mmcv_minimum_version)

requirements/mminstall.txt

@@ -1,2 +1,2 @@
-mmcv-full>=1.3.8,<1.7.0
+mmcv-full>=1.3.8,<1.8.0
 mmdet>=2.21.0,<3.0.0