Explicity provide lxml parser to beautifulsoup

BeautifulSoup would generate warnings without an explicit parser which
shows up in the test results as well.
It is always better to look at clean test results than one filled with
unnecessary warnings.

Signed-off-by: Hritik Vijay <hritikxx8@gmail.com>
Signed-off-by: Pushpit <pushpit07@gmail.com>

Author: Hritik14

vulnerabilities/importers/nginx.py

@@ -66,7 +66,7 @@ def updated_advisories(self):
 
     def to_advisories(self, data):
         advisories = []
-        soup = BeautifulSoup(data)
+        soup = BeautifulSoup(data, features="lxml")
         vuln_list = soup.select("li p")
 
         # Example value of `vuln_list` :

vulnerabilities/importers/postgresql.py

@@ -58,7 +58,7 @@ def updated_advisories(self):
 
 def to_advisories(data):
     advisories = []
-    soup = BeautifulSoup(data)
+    soup = BeautifulSoup(data, features="lxml")
     table = soup.select("table")[0]
     for row in table.select("tbody tr"):
         ref_col, affected_col, fixed_col, severity_score_col, desc_col = row.select("td")