Require fresh fmf with the sort support

Author: psss

pyproject.toml

@@ -32,7 +32,7 @@ classifiers = [
 dependencies = [              # F39 / PyPI
     "click>=8.0.3,!=8.1.4",   # 8.1.3 / 8.1.6 TODO type annotations tmt.cli.Context -> click.core.Context click/issues/2558
     "docutils>=0.16",         # 0.16 is the current one available for RHEL9
-    "fmf>=1.4.0",
+    "fmf>=1.6.0",
     "jinja2>=2.11.3",         # 3.1.2 / 3.1.2
     "packaging>=20",          # 20 seems to be available with RHEL8
     "pint>=0.16.1",           # 0.16.1
@@ -90,7 +90,7 @@ docs = [
     "readthedocs-sphinx-ext",
     "docutils>=0.18.1",
     "Sphinx==7.3.7",
-    "fmf>=1.4.0",
+    "fmf>=1.6.0",
     ]
 
 [project.scripts]