This resolves the following error occurring in production:

```
TypeError: Cannot read property 'slice' of null
/home/m/shields/lib/suggest.js in findSuggestions at line 40:33
  const userRepo = url.pathname.slice(1).split('/');
```

This resolves the following error occurring in production:

```
TypeError: Cannot read property 'slice' of null
/home/m/shields/lib/suggest.js in twitterPage at line 63:31
  const schema = url.protocol.slice(0, -1);
```

Instead of centralizing examples, specify them from within a service.

* Avoid duplication in service loading + refactor
* Avoid duplication in URLs, rename uri -> url in BaseService

* Added missing try-catch block

* Added tests to cover malformed responses

Missing from #1619

* fix(package): update svgo to version 1.0.5
* Update package-lock
* Update invocation for SVGO 1.x
* Remove helper

Make a clear distinction between programmer errors ("internal errors") and runtime errors, and allow configuring the server to let the programmer errors bubble up in development and unit testing. This saves a huge amount of time because it generates ordinary stack traces when things go wrong. And, if these errors occur in production, we'll catch them, and display **shields | internal error** which is the equivalent of a 500 error.

This cleans up the work from #1582, clarifying concerns, removing a bit of duplication, and renaming for clarity.

* optimize cssColor regex

* Add comment & tests

* update test to not export cssColor

* [0-9] -> \d

* Add Stack Exchange logos

* Optimize Stack Exchange logos with svgomg

closes #1637

* Add dynamic yaml badge

* Forgot package lock

* Switch tests to yaml data source

* Add yaml to the dynamic badge maker options

* Reorder to match documentation examples

* Reordered dynamic types to be alphabetical

* Removed regex as pinend commit makes it unnecessary and fixed url

* Removed unused import

* Add more YAML MIME types

* Removed duplicate tests which don't differ between data types

* set expires header corresponding to maxAge

* add tests

* Support for buildkite

* Added to the examples as well

* Removed the unnecessary label property

* Fixed the example

* Improve the tests

* Made the branch optional and review suggestions

* Added network error test

* Unexpected response test

* PR review suggestions

* Updated test to include all responses

* Forgot one of the tests

* [Codeship] fix status checking regexp

we don't need to match the file extension to determine the status

* [Codeship] handle new build statuses

based on https://documentation.codeship.com/general/account/notifications/#webhook

* add codeship logo

* minify codeship logo

* Travis integration uses checkErrorResponse

* checkErrorResponse added to service tests doc

* pass error object to InvaildResponse()

this prevents us from throwing
TypeError: Cannot read property 'stack' of undefined
when we attempt to parse invalid json

* refactor [cdnjs] integration

* The most recent code examples in tutorial

* An extra empty line removed

* An extra escapring characters removed

* checkErrorResponse mentioned in tutorial

* Typo fix in tutorial

* Static badges as examples in tutorial

* Missing word in the tutorial added

* Typo fix in tutorial

* allow services to export >1 classes

This change to loadServiceClasses() allows us to define
services which either export a single service class e.g:

module.exports = class Cdnjs extends BaseService {
  //...
}

or more than one. e.g:

module.exports = {
  GemVersion,
  GemDownloads,
  GemOwner,
  GemRank,
}

* refactor ruby gem badges

- move badge code to service classes
- throw exceptions for errors
- use let and const
- change tests to expect 'downloads' label for error badges
- general tidying

* fix typo in tests

* Don't always use class name in example label

This allows (for example) GemVersion and GemDownloads
both to use the example label 'Gem'

* Add LGTM Grade badge

* Add new tests for LGTM Grade badge

* Add lgtm grade example to homepage

make exception classes more consistent

* Color fix for Docker Hub automated integration

* Test for overriding colorB in docker stars badge

* Test for overriding colorB in docker pulls badge

* #008bb8 is color of automated docker builds

* Test for overriding colorB in docker build badge

* Overriding colorB in docker stars badge

* Overriding colorB in docker pulls badge

* Overriding colorB in docker automated badge

* Better assertions in docker tests

* The default docker color updated to match the logo

* Example with a path query parameter

* Support for David path query parameters

* David path not found test

* [david] updated invalid path test

* Add Liberapay logo.

* Add variations.

* Optimize SVG.

* Remove logo testing variants.

* fix(package): update pretty-bytes to version 5.0.0

* update package-lock

update request to version 2.87.0

update sinon to version 5.0.7

Throw Error in version() on invalid inputs

* Basic version of commit-status badge added

* Support for case with no common ancestor

* Handle unknown branch

* Service tests with error responses

* Handle unexpected 404 responses from github

* Branch is a base

* Tests reordered

* Using not the newest commit in tests

* Test for checked commit identical with the newest commit in branch

* Code refactoring

* Example for Github commit merge status

* upgrade danger.js to latest version

* If PR contains tests using assert, suggest expect syntax

* if PR touches service, check service tester also touched

- Expect `TypeScript vX.Y | Flow vX.Y`
  instead of `TypeScript vX.Y Flow vX.Y`
- Allow version numbers to have more than >1 digit
  after the point

* chore(package): update nyc to version 12.0.1

* update package-lock

* chore(package): update snap-shot-it to version 5.0.1

* update package-lock

NPM changed the error body,
breaking the not found case

Fix this by checking the status
code instead of relying on
the errror message in the body.

The version we were testing against
seems to have gone away - spooky 👻
https://code.dlang.org/api/packages/vibe-d/0.7.23/stats

Switch to a version that exists:
https://code.dlang.org/api/packages/vibe-d/0.7.27/stats

* update nock

The version we were using didn't allow
regex pattern with allowUnmocked option.

Update to latest version which includes this patch:
nock/nock#1068

* update codeclimate test to allow any snapshot id on second call

This test was failing because the
snapshot id changed for some reason.

This change allows that to happen
and we will still intercept the
second API call.

It appears this does not only
happen on the weekly stats.
refs #1713

* chore(package): update sinon to version 6.0.0

* update package-lock

Provide support for query parameters, in parity with the functionality in old-style services.

…ice (#1702)

* refactor clojars integration

* DRY up services that request data from JSON endpoints

For #1358

`sandbox.create()` is deprecated. Use default sandbox at `sinon.sandbox` or create new sandboxes with `sinon.createSandbox()`

* Add [dependabot] SemVer compatibility badge

* Add dependabot logo

* Clean up and additional tests

Also update `engines`.

Closes #1660