Merge pull request ethereum#63 from carver/towncrier-upgrade

Upgrade towncrier to fix the duplicate title bug

Author: carver

Makefile

@@ -46,7 +46,7 @@ build-docs:
 	$(MAKE) -C docs html
 	$(MAKE) -C docs doctest
 	./newsfragments/validate_files.py
-	towncrier --draft --version preview
+	towncrier build --draft --version preview
 
 docs: build-docs
 	open docs/_build/html/index.html
@@ -63,7 +63,7 @@ notes: check-bump
 	# Let UPCOMING_VERSION be the version that is used for the current bump
 	$(eval UPCOMING_VERSION=$(shell bumpversion $(bump) --dry-run --list | grep new_version= | sed 's/new_version=//g'))
 	# Now generate the release notes to have them included in the release commit
-	towncrier --yes --version $(UPCOMING_VERSION)
+	towncrier build --yes --version $(UPCOMING_VERSION)
 	# Before we bump the version, make sure that the towncrier-generated docs will build
 	make build-docs
 	git commit -m "Compile release notes"

setup.py

@@ -20,7 +20,7 @@
     'doc': [
         "Sphinx>=1.6.5,<2",
         "sphinx_rtd_theme>=0.1.9,<1",
-        "towncrier>=19.2.0, <20",
+        "towncrier>=21,<22",
     ],
     'dev': [
         "bumpversion>=0.5.3,<1",