SNOW-121725: Bumpup version to 2.1.0

SNOW-117681: Bump up version to 2.0.4

SNOW-115098: Bump up version to 2.0.3

SNOW-104246: Bump Up snowflake Python Connector Version to 2.0.2

SNOW-100497: Bump up version to 2.0.1

SNOW-98856: Fix memory leak in python connector panda df fetch API

SNOW-84977: Add pandas module to test setup

updated release note

SNOW-88339: Bumped up version to 1.8.6

delete unused file. disabled 390111 unit test as mock doesn't work as…

… expected