build(deps): update dulwich requirement from <0.22.5,>=0.21.7 to >=0.…

…21.7,<0.22.7 (#581)

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requirements/base.txt

@@ -1,5 +1,5 @@
 distro==1.9.* ; sys_platform == 'linux'
-dulwich>=0.21.7,<0.22.5
+dulwich>=0.21.7,<0.22.7
 giturlparse>=0.12,<0.13
 imagesize>=1.4,<1.5
 packaging>=20,<25