Case with some edge cases:
```
$ opam show --color never --normalise --root $PWD -f all-versions opam-state
2.0~alpha5  2.0.0~beta  2.0.0~beta3  2.0.0~beta3.1  2.0.0~beta5  2.0.0~rc  2.0.0~rc2  2.0.0~rc3  2.0.0  2.0.1  2.0.2  2.0.3  2.0.4  2.0.5  2.0.6  2.0.7  2.0.8  2.0.9  2.1.0~beta2  2.1.0~beta4  2.1.0~rc  2.1.0~rc2  2.1.0
```

The default python ordering does not work as is, due to the ~ most likely [1]:
```
In [1]: versions = ["2.0~alpha5",
   ...:  "2.0.0~beta",
   ...:  "2.0.0~beta3",
   ...:  "2.0.0~beta3.1",
   ...:  "2.0.0~beta5",
   ...:  "2.0.0~rc",
   ...:  "2.0.0~rc2",
   ...:  "2.0.0~rc3",
   ...:  "2.0.0",
   ...:  "2.0.1",
   ...:  "2.0.2",
   ...:  "2.0.3",
   ...:  "2.0.4",
   ...:  "2.0.5",
   ...:  "2.0.6",
   ...:  "2.0.7",
   ...:  "2.0.8",
   ...:  "2.0.9",
   ...:  "2.1.0~beta2",
   ...:  "2.1.0~beta4",
   ...:  "2.1.0~rc",
   ...:  "2.1.0~rc2",
   ...:  "2.1.0"]

In [2]: versions2 = versions.copy()

In [3]: versions2.sort()

In [5]: versions2 == versions   # ------------> default ordering says no
Out[5]: False

In [12]: from packaging.version import Version, parse

In [13]: parse("2.0~alpha5")
Out[13]: <LegacyVersion('2.0~alpha5')>

In [14]: versions2 = sorted(versions, key=parse)

In [24]: versions2
Out[24]:
['2.0~alpha5',
 '2.0.0~beta',
 '2.0.0~beta3',
 '2.0.0~beta3.1',
 '2.0.0~beta5',
 '2.0.0~rc',
 '2.0.0~rc2',
 '2.0.0~rc3',
 '2.1.0~beta2',
 '2.1.0~beta4',
 '2.1.0~rc',
 '2.1.0~rc2',
 '2.0.0',
 '2.0.1',
 '2.0.2',
 '2.0.3',
 '2.0.4',
 '2.0.5',
 '2.0.6',
 '2.0.7',
 '2.0.8',
 '2.0.9',
 '2.1.0']

In [25]: versions2 == versions  # ----> another tryout fails to compare as well
Out[25]:
False
```

[1] https://github.com/ocaml/opam/blob/master/src/core/opamVersionCompare.ml#L58-L61