v1.2.0

GlobalSensitivity v1.2.0

Diff since v1.1.0

Merged pull requests:

• Transpose regression based sensitivity results (#38) (@Vaibhavdixit02)
• Add design matrix dispatch for regression_sensitivity (#39) (@Vaibhavdixit02)
• Add juliacon talk script to docs (#42) (@Vaibhavdixit02)