input: Write a python function to plot a horizontal bar chart showing the total number of Coronavirus cases by country.
  assert plot_coronavirus_cases([['United States', 212000], ['Russia', 180000], ['Italy', 105000], ['Spain', 90000], ['Germany', 70000]]) == None
output: def plot_coronavirus_cases(data):
      import matplotlib.pyplot as plt
      
      countries = [item[0] for item in data]
      cases = [item[1] for item in data]
      
      plt.barh(countries, cases, color='skyblue')
      plt.xlabel('Number of Cases')
      plt.ylabel('Country')
      plt.title('Total Number of Coronavirus Cases by Country')
      plt.show()