feat: Split lerna version from of lerna publish (lerna#1522)

BREAKING CHANGE:
* `--preid` now defaults to "alpha" during prereleases:

  The previous default for this option was undefined, which led to an awkward "1.0.1-0" result when passed to `semver.inc()`.

  The new default "alpha" yields a much more useful "1.0.1-alpha.0" result. Any previous prerelease ID will be preserved, just as it was before.

* `--no-verify` is no longer passed to `git commit` by default, but controlled by the new `--commit-hooks` option:

  The previous behavior was too overzealous, and the new option operates exactly like the corresponding [npm version](https://docs.npmjs.com/cli/version#commit-hooks) option of the same name.

  As long as your pre-commit hooks are properly scoped to ignore changes in package.json files, this change should not affect you. If that is not the case, you may pass `--no-commit-hooks` to restore the previous behavior.

Fixes lerna#277
Fixes lerna#936
Fixes lerna#956
Fixes lerna#961
Fixes lerna#1056
Fixes lerna#1118
Fixes lerna#1385
Fixes lerna#1483
Fixes lerna#1494

collect-updates.js

@@ -2,7 +2,6 @@
 
 const log = require("npmlog");
 const childProcess = require("@lerna/child-process");
-const semver = require("semver");
 
 const hasTags = require("./lib/has-tags");
 const collectDependents = require("./lib/collect-dependents");
@@ -43,10 +42,10 @@ function collectUpdates(filteredPackages, packageGraph, execOpts, commandOptions
     candidates = new Set();
 
     const hasDiff = makeDiffPredicate(committish, execOpts, commandOptions.ignoreChanges);
-    const needsBump = (commandOptions.cdVersion || "").startsWith("pre")
+    const needsBump = (commandOptions.bump || "").startsWith("pre")
       ? () => false
       : /* skip packages that have not been previously prereleased */
-        node => semver.prerelease(node.version);
+        node => node.prereleaseId;
 
     packages.forEach((node, name) => {
       if (forced.has(name) || needsBump(node) || hasDiff(node)) {

package.json

@@ -34,7 +34,6 @@
     "@lerna/child-process": "file:../../core/child-process",
     "minimatch": "^3.0.4",
     "npmlog": "^4.1.2",
-    "semver": "^5.5.0",
     "slash": "^1.0.0"
   }
 }