clean up readme and clean up dependency version

Author: alysivji

README.md

@@ -10,7 +10,7 @@
 pip install falcon-apispec
 ```
 
-Requires `apispec v1.0` (works with beta). You might need to check the latest version of the [docs](https://apispec.readthedocs.io/en/latest/) for exact usage. I won't be tracking changes until `apispec` hits 1.0rc1.
+Works with `apispec v1.0+`.
 
 ## Example Application
 

requirements.txt

@@ -1,5 +1,4 @@
-PyYAML>=3.10
-apispec<1.4
+apispec>=1.0
 falcon
 flake8
 pytest

setup.py

@@ -52,8 +52,7 @@ def find_version(*file_paths):
     keywords="falcon apispec swagger openapi specification documentation spec rest api",
 
     install_requires=[
-        "PyYAML>=3.10",
-        "apispec<1.4",
+        "apispec>=1.0",
         "falcon",
     ],
     packages=find_packages(exclude=["tests", ]),