Merge pull request rthalley#669 from rthalley/dependabot/pip/trio-gte…

…-0.14-and-lt-0.20

Update trio requirement from >=0.14,<0.19 to >=0.14,<0.20

pyproject.toml

@@ -14,7 +14,7 @@ requests-toolbelt = {version="^0.9.1", optional=true}
 requests = {version="^2.23.0", optional=true}
 idna = {version="^2.1", optional=true}
 cryptography = {version=">=2.6,<4.0", optional=true}
-trio = {version=">=0.14,<0.19", optional=true}
+trio = {version=">=0.14,<0.20", optional=true}
 curio = {version="^1.2", optional=true}
 sniffio = {version="^1.1", optional=true}