Parse some abbreviated strings as relative dates

dateparser so far did consider strings like "1h20m" as an absolute time.
This commit changes that, so "1h20" remains an absolute time, while
"1h20m" is now considered a relative date. This makes the output much
more predictable and not dependent on the use of whitespaces anymore.

Fixes #1012

Behavior before the changes:

```python
>>> from datetime import datetime
>>> import dateparser
>>> ref_date = datetime(2023, 1, 2, 3, 4, 5)
>>> dateparser.parse("1h20", settings={"RELATIVE_BASE": ref_date})
datetime.datetime(2023, 1, 2, 1, 20)
>>> dateparser.parse("1h20m", settings={"RELATIVE_BASE": ref_date})
datetime.datetime(2023, 1, 2, 1, 20)
>>> dateparser.parse("1h 20m", settings={"RELATIVE_BASE": ref_date})
datetime.datetime(2023, 1, 2, 1, 44, 5)
>>> dateparser.parse("1h20m", settings={"RELATIVE_BASE": ref_date,
                                        "PREFER_DATES_FROM": "future"})
datetime.datetime(2023, 1, 3, 1, 20)
```

Behavior after the changes:

```python
>>> from datetime import datetime
>>> import dateparser
>>> ref_date = datetime(2023, 1, 2, 3, 4, 5)
>>> dateparser.parse("1h20", settings={"RELATIVE_BASE": ref_date})
datetime.datetime(2023, 1, 2, 1, 20)
>>> dateparser.parse("1h20m", settings={"RELATIVE_BASE": ref_date})
datetime.datetime(2023, 1, 2, 1, 44, 5)
>>> dateparser.parse("1h 20m", settings={"RELATIVE_BASE": ref_date})
datetime.datetime(2023, 1, 2, 1, 44, 5)
>>> dateparser.parse("1h20m", settings={"RELATIVE_BASE": ref_date,
                                        "PREFER_DATES_FROM": "future"})
datetime.datetime(2023, 1, 2, 4, 24, 5)
```

dateparser/data/date_translation_data/en.py

@@ -800,7 +800,7 @@
             "(?:12\\s+)?midnight": "00:00"
         },
         {
-            "(\\d+[.,]?\\d*)h(\\d+[.,]?\\d*)m?": "\\1:\\2"
+            "(\\d+[.,]?\\d*)h(\\d+[.,]?\\d*)": "\\1:\\2"
         },
         {
             "(?<=from\\s+)now": "in"

dateparser_data/supplementary_language_data/date_translation_data/en.yaml

@@ -67,7 +67,7 @@ simplifications:
     - a: '1'
     - (?:12\s+)?noon: '12:00'
     - (?:12\s+)?midnight: '00:00'
-    - (\d+[.,]?\d*)h(\d+[.,]?\d*)m?: \1:\2
+    - (\d+[.,]?\d*)h(\d+[.,]?\d*): \1:\2
     - (?<=from\s+)now: in
     - less than 1 minute ago: 45 second ago
     - (\d+[.,]?\d*) (decade|year|month|week|day|hour|minute|second)s? later: in \1 \2

tests/test_languages.py

@@ -1088,6 +1088,14 @@ def test_translation(self, shortname, datetime_string, expected_translation):
             param("en", "day before yesterday", "2 day ago"),
             param("en", "last month", "1 month ago"),
             param("en", "less than a minute ago", "45 second ago"),
+            param("en", "10h11", "10:11"),
+            param("en", "10h11m", "10 hour 11 minute"),
+            param("en", "3d8h2m", "3 day 8 hour 2 minute"),
+            param("en", "5d9h59m10s", "5 day 9 hour 59 minute 10 second"),
+            param("en", "3d1h", "3 day 1 hour"),
+            param("en", "3d29m", "3 day 29 minute"),
+            param("en", "1.5d10s", "1.5 day 10 second"),
+            param("en", "7m1s", "7 minute 1 second"),
             # German
             param("de", "vorgestern", "2 day ago"),
             param("de", "heute", "0 day ago"),