core, dependencies: make Libervia compatible with Python 3.14:

- work around a deprecated behaviour in `asyncio.get_event_loop` until the fix is
  integrated in a released Twisted.
- update dependencies to have versions compatible with Python 3.14
- disable `term-image` which is bounded to incompatible Pillow version. It is unmaintained
  for 1 year, and will probably be removed soon in favor of `textual-image`.

pyproject.toml

@@ -29,14 +29,14 @@ dependencies = [
     "html2text < 2020.2",
     "jinja2 >= 3.1.2",
     "langid < 2",
-    "lxml ~= 5.2",
+    "lxml",
     "lxml_html_clean >= 0.1.1",
     "markdown >= 3.0",
     "miniupnpc >= 2.3.3",
     "mutagen < 2",
     "oldmemo >= 1.0.0, < 2",
     "omemo >= 1.0.0, < 2",
-    "pillow >= 6.0.0",
+    "pillow >= 11.3.0",
     "progressbar2 < 3.54",
     "pydantic ~= 2.12",
     "pydantic-settings ~= 2.12",
@@ -54,10 +54,7 @@ dependencies = [
     "shortuuid ~= 1.0.11",
     "sqlalchemy >= 1.4",
     "treq ~= 24.9.0",
-    # We have to restrict to a version < 24.11.0 due to Wokkel being unmaintained (it
-    # depends on twisted.python.constants which has been removed). This is temporary until
-    # a solution is found for Wokkel.
-    "twisted[tls] >= 22.10, < 24.11.0",
+    "twisted[tls] >= 22.10",
     "twomemo >= 1.0.0, < 2",
     "txdbus",
     "urwid >= 1.2.0, < 3",
@@ -84,7 +81,9 @@ GUI = [
     "PyQt6"
 ]
 TUI = [
-    "term-image ~= 0.7.1"
+    # We have to disable term-image due to bounded pillow constraint, which is
+    # incompatible with the minimal version required for Python 3.14
+    # "term-image >= 0.7.1"
 ]
 webrtc = [
     "pygobject >= 3.48",