fix handling of dev version

Author: blink1073

jupyter_releaser/tests/test_functions.py

@@ -183,6 +183,9 @@ def test_bump_version(py_package):
     util.bump_version("1.0.3a5")
     util.bump_version("next")
     assert util.get_version() == "1.0.3a6"
+    util.bump_version("1.0.3.dev1")
+    util.bump_version("next")
+    assert util.get_version() == "1.0.3.dev2"
 
 
 def test_get_config_python(py_package):

jupyter_releaser/util.py

@@ -219,7 +219,9 @@ def bump_version(version_spec, version_cmd=""):
     if "tbump" in version_cmd:
         v = parse_version(get_version())
         if version_spec == "next":
-            if v.is_prerelease:
+            if v.is_devrelease:
+                version_spec = f"{v.major}.{v.minor}.{v.micro}.dev{v.dev + 1}"
+            elif v.is_prerelease:
                 version_spec = f"{v.major}.{v.minor}.{v.micro}{v.pre[0]}{v.pre[1] + 1}"
             else:
                 version_spec = f"{v.major}.{v.minor}.{v.micro + 1}"