Solve ISSUE #7

[Invincible1602]

Fixes #7

Data Cleaning:

• Fill the missing values with the help of the Simple Imputer.
• Remove the column which is not unique example: Country.
• Convert year to int and subtract it from current year.
• Use label encoding for converting text into numerical data.
• After that, we standardize the data.

[darshbaxi]

Awesome! looks good:)

[darshbaxi]

@Invincible1602 Could have improved the PR title.