fix: throw on missing info during release prep

[codebytere]

Fixes the following potential error:

Error: git config,--get,remote.undefined.url failed with stderr:
    at exports.runSync (/Users/mylesborins/.nvm/versions/node/v14.15.0/lib/node_modules/node-core-utils/lib/run.js:84:11)
    at new ReleasePreparation (/Users/mylesborins/.nvm/versions/node/v14.15.0/lib/node_modules/node-core-utils/lib/prepare_release.js:50:26)
    at main (/Users/mylesborins/.nvm/versions/node/v14.15.0/lib/node_modules/node-core-utils/components/git/release.js:71:18)
    at release (/Users/mylesborins/.nvm/versions/node/v14.15.0/lib/node_modules/node-core-utils/components/git/release.js:53:21)
    at Object.handler (/Users/mylesborins/.nvm/versions/node/v14.15.0/lib/node_modules/node-core-utils/components/git/release.js:38:12)
    at Object.runCommand (/Users/mylesborins/.nvm/versions/node/v14.15.0/lib/node_modules/node-core-utils/node_modules/yargs/build/lib/command.js:196:48)
    at Object.parseArgs [as _parseArgs] (/Users/mylesborins/.nvm/versions/node/v14.15.0/lib/node_modules/node-core-utils/node_modules/yargs/build/lib/yargs.js:1043:55)
    at Object.get [as argv] (/Users/mylesborins/.nvm/versions/node/v14.15.0/lib/node_modules/node-core-utils/node_modules/yargs/build/lib/yargs.js:986:25)
    at Object.<anonymous> (/Users/mylesborins/.nvm/versions/node/v14.15.0/lib/node_modules/node-core-utils/bin/git-node:22:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)

by catching and returning when ncu-config data is not present.

cc @nodejs/node-core-utils @MylesBorins

[codecov]

Codecov Report

Merging #519 into master will increase coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #519      +/-   ##
==========================================
+ Coverage   82.29%   82.49%   +0.19%     
==========================================
  Files          34       35       +1     
  Lines        1717     1742      +25     
==========================================
+ Hits         1413     1437      +24     
- Misses        304      305       +1     

Impacted Files	Coverage Δ
lib/cli.js	88.73% <0.00%> (ø)
lib/release/utils.js	96.00% <0.00%> (ø)

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