DOC: Updated conan dependency.

doc/DEPENDENCIES.md

@@ -3,7 +3,7 @@
 ## General ##
 
 ```
->=conan-1.37.2 (e.g. with `pip install conan`)
+>=conan-1.43 (e.g. with `pip install conan`)
 >=cmake-3.13
 >=gcc-10.2.0 | >=clang-11
 ```