Modify imports according to restructured code

Signed-off-by: Tushar Goel <tushar.goel.dav@gmail.com>

Author: TG1999

src/univers/conan/version.py

@@ -1,6 +1,6 @@
 from functools import total_ordering
 
-from conans.errors import ConanException
+from univers.conan.errors import ConanException
 
 
 @total_ordering

src/univers/conan/version_range.py

@@ -1,7 +1,7 @@
 from collections import namedtuple
 
-from conans.errors import ConanException
-from conans.model.recipe_ref import Version
+from univers.conan.errors import ConanException
+from univers.conan.version import Version
 
 
 _Condition = namedtuple("_Condition", ["operator", "version"])

tests/test_conan_version_bump.py

@@ -1,6 +1,6 @@
 import pytest
 
-from conans.model.recipe_ref import Version
+from univers.conan.version import Version
 
 values = [
     ['1.0.0',       0, "2.0.0"],

tests/test_conan_version_comparison.py

@@ -1,6 +1,6 @@
 import pytest
 
-from conans.model.recipe_ref import Version
+from univers.conan.version import Version
 
 v = [("1", "2"),
      ("1.0", "1.1"),

tests/test_conan_version_range.py

@@ -1,8 +1,8 @@
 import pytest
 
-from conans.errors import ConanException
-from conans.model.recipe_ref import Version
-from conans.model.version_range import VersionRange
+from univers.conan.errors import ConanException
+from univers.conan.version import Version
+from univers.conan.version_range import VersionRange
 
 values = [
     ['>1.0.0',  [[['>', '1.0.0']]],                   ["1.0.1"],          ["0.1"]],