updtr crashes when (git) URLs as depencency are used

[Ivan Tanev]

Given a config like:

  "devDependencies": {
    "@types/jest": "^26.0.5",
    "@types/node": "^14.0.23",
    "bats": "https://github.com/bats-core/bats-core/archive/v1.2.1.tar.gz",
    "bats-assert": "git+https://github.com/bats-core/bats-assert.git",
    "bats-file": "git+https://github.com/bats-core/bats-file.git",
    "bats-support": "git+https://github.com/bats-core/bats-support.git",
    "jest": "^26.1.0",
    "prettier": "^2.0.5",
    "tiny-invariant": "^1.1.0",
    "ts-jest": "^26.1.3",
    "typescript": "^4.0.0-beta"
  }

Updtr fails with:

$ npx updtr
npx: installed 75 in 2.897s
Looking for outdated modules...
> npm outdated --json --depth=0 
⠹

 ERROR  Invalid Version: remote
    at new SemVer (/home/ivan/.npm/_npx/11875/lib/node_modules/updtr/node_modules/semver/semver.js:323:11)
    at compare (/home/ivan/.npm/_npx/11875/lib/node_modules/updtr/node_modules/semver/semver.js:614:10)
    at Function.lte (/home/ivan/.npm/_npx/11875/lib/node_modules/updtr/node_modules/semver/semver.js:668:10)
    at Object.test (/home/ivan/.npm/_npx/11875/lib/node_modules/updtr/dist/index.js:841:10)
    at /home/ivan/.npm/_npx/11875/lib/node_modules/updtr/dist/index.js:866:28
    at Array.findIndex (<anonymous>)
    at filterUpdateTask (/home/ivan/.npm/_npx/11875/lib/node_modules/updtr/dist/index.js:865:35)
    at /home/ivan/.npm/_npx/11875/lib/node_modules/updtr/dist/index.js:921:5
    at Array.map (<anonymous>)
    at /home/ivan/.npm/_npx/11875/lib/node_modules/updtr/dist/index.js:920:42