Add The Economist grabbers.

run.py

@@ -16,6 +16,9 @@ from sources.NYTBusiness import NYTBusiness
 from sources.NYTTechnology import NYTTechnology
 from sources.ReutersBusiness import ReutersBusiness
 from sources.ReutersTechnology import ReutersTechnology
+from sources.TheEconomistBusiness import TheEconomistBusiness
+from sources.TheEconomistFinance import TheEconomistFinance
+from sources.TheEconomistTechnology import TheEconomistTechnology
 from sources.Wired import Wired
 
 DATABASE_PATH = Path("storage.db")
@@ -44,6 +47,9 @@ def main():
             NYTTechnology(db),
             ReutersBusiness(db),
             ReutersTechnology(db),
+            TheEconomistBusiness(db),
+            TheEconomistFinance(db),
+            TheEconomistTechnology(db),
             Wired(db),
         ]
 

sources/TheEconomistBusiness.py

@@ -0,0 +1,5 @@
+from grabber import Grabber
+
+
+class TheEconomistBusiness(Grabber):
+    feed_url = "https://www.economist.com/business/rss.xml"

sources/TheEconomistFinance.py

@@ -0,0 +1,5 @@
+from grabber import Grabber
+
+
+class TheEconomistFinance(Grabber):
+    feed_url = "https://www.economist.com/finance-and-economics/rss.xml"

sources/TheEconomistTechnology.py

@@ -0,0 +1,5 @@
+from grabber import Grabber
+
+
+class TheEconomistTechnology(Grabber):
+    feed_url = "https://www.economist.com/science-and-technology/rss.xml"