Fix most errors in Terminal.ts

src/Types.ts

@@ -12,3 +12,8 @@ export type LinkMatcher = {
 };
 export type LinkMatcherHandler = (event: MouseEvent, uri: string) => boolean | void;
 export type LinkMatcherValidationCallback = (uri: string, element: HTMLElement, callback: (isValid: boolean) => void) => void;
+
+// TODO: Make this type more specific
+export type TerminalOptions = {[key: string]: any};
+export type CustomKeyEventHandler = (event: KeyboardEvent) => boolean;
+export type Charset = {[key: string]: string};