v8.8.0

feat

• Locks: Add skip locked feature to lockForUpdate
  (eea76c6)
• QueryBuilder: Make columns optional for insertUsing
  (3ff0f1f)
• QueryBuilder: Add insertIgnore
  (6238626)
• SqlServerGrammar: Allow deleting unmatched source records in upsert (cc9c106)
• QueryBuilder: Allow using a source callback or QueryBuilder in upserts
  (ac2d959)
• QueryBuilder: Add insertUsing to use queries to insert into tables
  (47a2c64)

fix

• OracleGrammar: Don't uppercase quoted aliases in Oracle (5b54d1d)
• QueryBuilder: Fix for aliases in update statements (f72ea0c)
• QueryBuilder: Don't sort columns for insertUsing
  (3f9b15f)
• QueryBuilder: Add subquery bindings in insert and upsert statements
  (7ea072f)
• QueryBuilder: Maintain column order when using source in upsert
  (c44e626)