Release v2.2.2

• chore(stock_balance): fix indentation (#1315)
• chore: minor change added to aurthorization request method name (#1313)
• fix: server error fixed, employee autoname fixed, contract move from bloomstack_core to erpnext (#1312)
• fix: index error fixed for item_alternative query (#1300)
• fix: leave allocation dashboard shows wrong total allocated leaves issue fixed (#1308)
• chore: Due date validation in quotation (#1294)
• fix: validate requested and transaction date (#1296)
• fix: fixed some tweaks in the sales invoice print format (#1303)
• Chore: Made customer field mandatory for Sales Invoice (#1293)
• chore: added comments to purchase_receipt.py and stock_entry.py (#1279)
• fix: remove main cost center column if deselected (#1299)
• chore: create default delivery warehouse, set default delivery warehouse in flowkana shipping request (#1288)
• chore: rearrange fields in Promotional Scheme (#1295)