Use ==/!= to compare constant literals (str, bytes, int, float, tuple)

Avoid [SyntaxWarnings on Python >= 3.8](https://docs.python.org/3/whatsnew/3.8.html#porting-to-python-3-8).

% `python3.8`
```
>>> 0 is 0
<stdin>:1: SyntaxWarning: "is" with a literal. Did you mean "=="?
```

h8mail/utils/classes.py

@@ -224,7 +224,7 @@ def get_intelx(self, api_keys):
  for record in search["records"]:
  filename = record["systemid"].strip() + ".txt"
  intel_files.append(filename)
- if record["media"] is not 24:
+ if record["media"] != 24:
  c.info_news(
  "Skipping {name}, not text ({type})".format(
  type=record["mediah"], name=record["name"]
@@ -419,7 +419,7 @@ def get_scylla(self, user_query="email"):
  self.data.append(("SCYLLA_USERNAME", k))
  self.pwned += 1
  elif (
- "Email" in field and k is not None and user_query is not "email"
+ "Email" in field and k is not None and user_query != "email"
  ):
  self.data.append(("SCYLLA_EMAIL", k))
  self.pwned += 1