Bump version to 1.2.0

[filippsen]

Description of the Change

Bump new version containing the following changes:

• Addition: Add a warning modal when trying to deploy to Mainnet Make it actually a bit harder to deploy to Mainnet #162
• Improvement: Enable arrays as input when interacting with contract Enable arrays as input parameters when interacting with deployed contract #186
• Improvement: Allow for grouping code blocks in editor (folding) Allow for grouping code blocks / contexts in editor (folding) #230
• Change: Update the list of upcoming features Update the list of upcoming features #254
• Fix: Account injections not working in appview for test networks Appview doesn't inject account wallets on testnets #256
• Fix: Typos in Voting template Typos in Voting template #243
• Fix: Uncaught error when trying to use inheritance without specifying base constructor arguments Uncaught error when trying to use inheritance without specifying base constructor arguments #101
• Fix: Uncaught error when compiling code missing implementation Uncaught error when compiling code that is missing implementation (interface) #205

[bashlund]

Awesome!