Minor bug fixes

Fixed adding assignee to the newly created Pull Request.
Fixed bug with not adding description to the created issue.

Removed console.logs

Removed unnecessary console.log

Missing modules

Fixed missing 'extensions' module error

Missing modules

Fixed missing modules after publish

No more 'shelljs'

Replaced 'shelljs' with custom 'child_process' implementation.
Fixed '--version' option.
Added 'close' option.

Example:

itg close wont-do
itg close done
itg close "Custom comment"
itg close

Windows system fixes

Windows issues fixed

• creating directories recurrsively wasn't handled properly
• opening a website wasn't possible
• saved token's names were the same on all computers and for all users
• shelljs module import was missing

Missing graphql module

Merge pull request #26 from Pawelek99/missing-graphql-module-i25

Missing graphql module

Missing dependency fix

Package dotenv wasn't removed properly

Omitting 'issue' prefix is now possible

Now you can type for example:

itg my_new_issue

and it will interpreted as if it was called:

itg i "my_new_issue"

To enable this behavior, type:

itg --disable-warning

Also now you have proper --version option:

itg -v

will output:
0.4.0

Fixed missing files

Merge pull request #17 from Pawelek99/save-token-globally-i15

Save token globally