Updated dependencies

requirements.txt

@@ -5,20 +5,24 @@ cython
 
 paho-mqtt
 
-cycler==0.10.0
-deprecation==2.0.7
+six
+deprecation
+
+cycler~=0.10.0
+
 eyeD3==0.9.5
 filetype==1.0.6
 hmmlearn==0.2.3
-joblib==0.14.1
-kiwisolver==1.2.0
-matplotlib==3.2.1
-numpy==1.18.2
-pyAudioAnalysis==0.3.0
+joblib~=1.0.1
+kiwisolver~=1.2.0
+matplotlib~=3.3.3
+numpy~=1.20.3
 pydub==0.23.1
 pyparsing==2.4.6
 python-dateutil==2.8.1
-scikit-learn==0.21.3
-scipy==1.4.1
-simplejson==3.17.0
-six==1.14.0
+scikit-learn~=0.24.0
+scipy~=1.6.2
+simplejson~=3.17.2
+
+
+pyAudioAnalysis~=0.3.0