fix: convert the common renderer to an ES6 class (#5978)
fix: convert the common renderer to an ES6 class (#5978)

* fix: run conversion script on renderer

* fix: cleanup from conversion script

* fix: format
google/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,mark-friedman/blockly,mark-friedman/blockly,mark-friedman/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,mark-friedman/blockly,google/blockly,google/blockly,google/blockly,google/blockly,google/blockly,mark-friedman/blockly,google/blockly,mark-friedman/blockly,rachel-fenichel/blockly