feat: Add basic TypeScript types (#26)

* feat: Add basic TypeScript types

I do not expect these to be completely accurate.
However, they should be a decent starting point for further discussion!

* feat: Add LEVEL to the types for convenience

* fix: useRollbarConfiguration's return to void

* feat(ts): Improvements on typing and formatting

* feat(ts): Add types to package.json

index.d.ts

@@ -0,0 +1,61 @@
+import { Component, ReactNode } from "react";
+import Rollbar, { Callback } from "rollbar";
+
+export const LEVEL_DEBUG = "debug";
+export const LEVEL_INFO = "info";
+export const LEVEL_WARN = "warn";
+export const LEVEL_ERROR = "error";
+export const LEVEL_CRITICAL = "critical";
+export type LEVEL =
+  | typeof LEVEL_DEBUG
+  | typeof LEVEL_INFO
+  | typeof LEVEL_WARN
+  | typeof LEVEL_ERROR
+  | typeof LEVEL_CRITICAL;
+
+export interface ErrorBoundaryProps {
+  children: ReactNode;
+  fallbackUI?: ReactNode;
+  errorMessage?: string | (() => string);
+  extra?:
+    | Record<string | number, unknown>
+    | (() => Record<string | number, unknown>);
+  level?: LEVEL | (() => LEVEL);
+  callback?: Callback<any>;
+}
+
+interface ErrorBoundaryState {
+  hasError: boolean;
+  error: Error | null;
+}
+
+export class ErrorBoundary extends Component<
+  ErrorBoundaryProps,
+  ErrorBoundaryState
+> {
+  resetError: () => void;
+}
+export class RollbarContext extends Component<{
+  children: ReactNode;
+  context?: string;
+}> {}
+export function useRollbar(): Rollbar;
+export function useRollbarConfiguration(config: Rollbar.Configuration): void;
+export function useRollbarContext(ctx?: string, isLayout?: boolean): void;
+export function useRollbarPerson(person: object): void;
+export function useRollbarCaptureEvent(metadata: object, level?: LEVEL): void;
+export function isValidLevel(level: LEVEL): boolean;
+
+export function historyContext(
+  rollbar: Rollbar,
+  args: {
+    formatter: (location: string, action: string) => string;
+    filter: (location: string, action: string) => boolean;
+  }
+): (
+  v4Location: {
+    action: string;
+    filter: (location: string, action: string) => boolean;
+  },
+  v4action: string
+) => void;

package.json

@@ -11,6 +11,7 @@
   "directories": {
     "lib": "dist"
   },
+  "types": "index.d.ts",
   "files": [
     "dist",
     "lib",