dep: rename use module to use_dep to match library naming

Author: radhermit

src/pkgcraft/dep/__init__.pxd

@@ -2,5 +2,5 @@ from .base cimport *
 from .cpn cimport *
 from .cpv cimport *
 from .pkg cimport *
-from .use cimport *
+from .use_dep cimport *
 from .version cimport *

src/pkgcraft/dep/__init__.py

@@ -2,5 +2,5 @@
 from .cpn import *
 from .cpv import *
 from .pkg import *
-from .use import *
+from .use_dep import *
 from .version import *

src/pkgcraft/dep/base.pyx

@@ -11,7 +11,7 @@ from ..error cimport Indirect
 from ..types cimport OrderedFrozenSet
 from .pkg cimport Dep
 from .uri cimport Uri
-from .use cimport UseDep
+from .use_dep cimport UseDep
 
 from ..error import PkgcraftError
 

src/pkgcraft/dep/pkg.pyx

@@ -9,7 +9,7 @@ from ..restrict cimport Restrict
 from ..types cimport OrderedFrozenSet
 from .cpn cimport Cpn
 from .cpv cimport Cpv
-from .use cimport UseDep
+from .use_dep cimport UseDep
 from .version cimport Version
 
 from .._misc import LruInstanceCache, WeakInstanceCache