Feast v0.14.1

Fixed bugs:

• Fix duplicate upload entity #1981 (achals)
• Fix bug in feast alpha enable CLI command #1940 (felixwang9817)
• Fix conditional statements for if OnDemandFVs exist #1937 (codyjlin)
• Fix __getitem__ return value for feature view and on-demand feature view #1936 (mavysavydav)
• Corrected setup.py BigQuery version that's needed for a contributor's merged PR 1844 #1934 (mavysavydav)

Merged pull requests:

• Updating roadmap + hero image #1950 (adchia)
• Simplify BigQuery load jobs #1935 (judahrand)