develop (#43)

* fix(ts): use strict mode strictNullChecks etc

* chore: Use extended React.HTMLAttributes<> (#41)

* refactor(code-format): add prettier closes #42

* feat(renderer): add snap to grid option closes #20

* chore(dependabot): use develop as target branch

src/contexts/NodeIdContext.ts

@@ -2,7 +2,7 @@ import { createContext } from 'react';
 
 import { ElementId } from '../types';
 
-type ContextProps = ElementId | null;
+type ContextProps = ElementId | null;
 
 export const NodeIdContext = createContext<Partial<ContextProps>>(null);
 export const Provider = NodeIdContext.Provider;