Try to solve poetry dependency issue resolution upstream

Author: apockill

README.rst

@@ -41,7 +41,7 @@ you are using. For example, if you are using BrainFrame version 0.26.1:
 
 .. code-block:: bash
 
-   pip3 install brainframe-api==0.26.1
+   pip3 install brainframe-api
 
 Documentation
 -------------

poetry.lock

@@ -1,7 +1,7 @@
 [tool.poetry]
 packages = [ { include = "brainframe/api" } ]
 name = "brainframe-api"
-version = "0.27.0"
+version = "0.28.0"
 description = "Provides a Python wrapper around the BrainFrame REST API."
 authors = ["Aotu"]
 license = "BSD-3-Clause"
@@ -18,7 +18,7 @@ python = "^3.6"
 requests = "^2.24.0"
 pillow = "^7.2.0"
 numpy = "^1.16"
-dataclasses = { version = "^0.7", python = "~3.6" }
+dataclasses = { version = "^0.7", python = ">=3.6,<3.7" }
 
 [tool.poetry.dev-dependencies]