decompose_variable_value cannot decompose m2

trying to decompose "m2" (meter square)

```python
from pyaedt.application.Variables import decompose_variable_value
values = ["3.123456m2"]
for value in values:
    print("*"*50)
    print("pyaedt:", decompose_variable_value(value))

```

output
pyaedt ('3.123456m2', 'm')

