[Dappbot Free Tier] - Update Stripe plans to reflect new signup on free tier - Lambda

[eximchain137]

The stripe plans are inferred from dappbot types package are changing. Eximchain/dappbot-types#8

The arguments are also used in the following places, once the change is made test and make sure nothing is broken.

The DappBotAPI Repo uses stripe plans to create trials in two places:

payment-gateway-stripe-lambda/src/api.ts

Line 38 in b78278f

createArgs.plans = Payment.trialStripePlan();

payment-gateway-stripe-lambda/src/services/stripe.ts

Line 26 in b78278f

const newSub = await stripe.subscriptions.create({