Fix sms params

setup.py

@@ -13,6 +13,7 @@ setup(
     author_email="danielmtesfai@gmail.com",
     url="https://github.com/dtesfai/voipms-python",
     license="MIT",
+    install_requires=['requests'],
     keywords="voipms api",
     packages=find_packages(exclude=["tests", "tests.*"]),
     python_requires=">=3.4",

voipms/api/dids/sms.py

@@ -13,4 +13,4 @@ class SMS():
 
     def set(self, params={}):
         self.method = "setSMS"
-        return self.base.request(self.method, params={})
+        return self.base.request(self.method, params=params)