feat: add tracer (#107)

* WIP - Tracer basic implementation

* Reorder Tracer methods

* Added stub methods for captureAWS & Clients

* Removed lodash

* Fixed SAM & Chalice variable comparison

* Added tracing provider

* Added capture lambda decorator

* Unit tests + format

* Removed package-lock, added npm-shrinkwrap

* WIP: capture clients

* Updated license in package

* Simplified unit tests

* Added more tests

* WIP examples

* WIP method decorator

* Enable tracing only when running in Lambda

* Removed redundant env restore commands in tests

* Fixed ERR_UNHANDLED_REJECTION

* Removed debug logs

* Updated packages & config

* Documentation

* Typing & Tests

* Updated package & config

* Added capture method

* Changed TracerInterface

* Removed Chalice references

* Sorted imports

* Fixed type for return of captureLambdaHandler

* Linting tests

* Fixed linting & added TODOs

* Applied fix to PowertoolLogFormatter see #304

Author: dreamorosi

packages/logger/tests/unit/formatter/PowertoolLogFormatter.test.ts

@@ -251,12 +251,13 @@ describe('Class: PowertoolLogFormatter', () => {
       try {
         shouldThrow();
       } catch (error) {
+        // TODO: review message content assertion (see Issue #304)
         // Assess
         expect(error).toBeInstanceOf(Error);
         const formattedTypeError = formatter.formatError(<Error>error);
         expect(formattedTypeError).toEqual({
           location: expect.stringMatching(/PowertoolLogFormatter.test.ts:[0-9]+/),
-          message: 'Cannot read property \'foo\' of null',
+          message: expect.stringMatching(/Cannot read propert/),
           name: 'TypeError',
           stack: expect.stringMatching(/PowertoolLogFormatter.test.ts:[0-9]+:[0-9]+/),
         });