newer towncrier works with py2.7

towncrier.pyproject.toml

@@ -1,8 +1,6 @@
 [tool.towncrier]
-# towncrier requires python3.5+ but Tahoe-LAFS doesn't support that
-# so we can't import it -- must specify --version to towncrier
-#    package = "allmydata"
-#    package_dir = "src"
+    package_dir = "src"
+    package = "allmydata"
     filename = "NEWS.rst"
     directory = "newsfragments"
     start_string = ".. towncrier start line"

tox.ini

@@ -68,7 +68,6 @@ commands =
 	 python -m towncrier.check
 
 [testenv:draftnews]
-basepython=python3.6
 passenv = TAHOE_LAFS_* PIP_* SUBUNITREPORTER_* USERPROFILE HOMEDRIVE HOMEPATH
 # Get "certifi" to avoid bug #2913. Basically if a `setup_requires=...` causes
 # a package to be installed (with setuptools) then it'll fail on certain
@@ -79,8 +78,7 @@ passenv = TAHOE_LAFS_* PIP_* SUBUNITREPORTER_* USERPROFILE HOMEDRIVE HOMEPATH
 whitelist_externals = mv
 deps =
      certifi
-     towncrier
-skip_install = true
+     towncrier >= 19.2
 commands =
          # With pip >= 10 the existence of pyproject.toml (which we are
          # required to have to configure towncrier) triggers a "build
@@ -93,9 +91,8 @@ commands =
          # https://github.com/pypa/pip/issues/5696
          mv towncrier.pyproject.toml pyproject.toml
 
-         # this burns in another copy of the version -- but we can't
-         # import tahoe until it supports python3.5+
-         python -m towncrier --draft --version 1.14.0
+         # towncrier 19.2 + works with python2.7
+         python -m towncrier --draft
 
          # put it back
          mv pyproject.toml towncrier.pyproject.toml