added missing build packages for snap

setup.py

@@ -22,7 +22,7 @@ setup(
     install_requires=read('requirements.txt'),
     include_package_data=True,
     zip_safe=True,
-    licence='GPLv3',
+    license='GPLv3',
     keywords='linux cpu speed power frequency turbo optimzier auto cpufreq',
     classifiers=[
         'Development Status :: 5 - Production/Stable',
@@ -32,4 +32,4 @@ setup(
         'Natural Language :: English'
     ],
     scripts=['bin/auto-cpufreq']
-)
+)

snap/snapcraft.yaml

@@ -15,6 +15,10 @@ parts:
   auto-cpufreq:
     plugin: python
     python-version: python3
+    build-packages:
+       - gcc
+       - python3-dev
+       - python3-wheel
     source: .
 
   deploy-cpufrectl:
@@ -34,7 +38,7 @@ apps:
       LC_ALL: C.UTF-8
       LANG: C.UTF-8
       PKG_MARKER: SNAP
-      
+
   service:
     command: bin/auto-cpufreq --daemon 2>&1 | tee -a $SNAP_DATA/auto-cpufreq.log
     plugs: