Upwork Inc (NASDAQ:UPWK) reported financial results for the second quarter after the market close on Wednesday. Here’s a look at the key metrics from the quarter. Q2 Revenue: $193.1 million, versus estimates of $193.04 millionQ2 EPS: 17 cents, versus estimates of 23 centsTotal revenue was up 15% year-over-year. Active clients increased 6% year-over-year to 868,000. Cash provided by operating activities came in at $37.3 million in the quarter. Upwork generated free cash flow of $33.5 million in the quarter, up from free cash flow of $1 million in the prior year’s quarter. GSV (gross sales value…