fix: correctly fetch package version

[sumwatshade]

My team has a use case where we are attempting to bundle our Oclif command. This provides us some benefits:

• If there are fewer files that we need to call chmod on, we can effectively reduce the install time for Homebrew, which needs to make the files executable.
• We want to test any performance gains from tree-shaking and minification

We noticed that once we bundled a command, we encountered the error:

Error: Cannot find module '/Users/lshadler/Documents/personal-workspace/dev-cli/lib/package.json'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
    at Function.Module._load (internal/modules/cjs/loader.js:562:25)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at checkNodeVersion (/dev/dev-cli/lib/commands/hello.js:156917:19)
    at __commonJS (/dev/dev-cli/lib/commands/hello.js:156927:3)
    at /dev/dev-cli/lib/commands/hello.js:11:5
    at Object.<anonymous> (/dev/dev-cli/lib/commands/hello.js:156942:28)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)

This change adjusts the package resolution to bubble up to the nearest package.json instead of short-circuiting to '..'

[salesforce-cla]

Thanks for the contribution! Unfortunately we can't verify the commit author(s): Lucas Shadler <l***@i***.com>. One possible solution is to add that email to your GitHub account. Alternatively you can change your commits to another email and force push the change. After getting your commits associated with your GitHub account, sign the Salesforce.com Contributor License Agreement and this Pull Request will be revalidated.

[codecov]

Codecov Report

Merging #170 (b8c7b57) into master (44a9a7f) will not change coverage.
The diff coverage is 0.00%.

@@          Coverage Diff           @@
##           master    #170   +/-   ##
======================================
  Coverage    0.00%   0.00%           
======================================
  Files           1       1           
  Lines          10      10           
  Branches        2       3    +1     
======================================
  Misses         10      10           

Impacted Files	Coverage Δ
src/index.ts	0.00% <0.00%> (ø)

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[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @lshadler to sign the Salesforce.com Contributor License Agreement.