jsPsych: Enabling an Open-Source Collaborative Ecosystem of Behavioral Experiments

Minor Changes

• #3385 3948fdc0ac176584fe4b8fe0b9cca5ed6e8b3afc Thanks @cherriechang! - Added citations property to info field of all plugins/extensions in two citation formats (apa, bibtex); added getCitations() as function in jsPsych package allowing user to generate citations by passing an array of plugins/extensions by name as first input and citation format as string as second input; changed template of plugins/extensions to contain citations field by default; citations for each plugin/extension are automatically generated from .cff file (if any) at its folder's root during build process; getCitations() prints out citations in the form of a string separating each citation with newline character, and always prints the jsPsych library citation first.