Closes https://github.com/renovatebot/config-help/issues/63

This reverts commit 247bdf6b.

Refactors template logic to test for isSingleVersion instead of the negative of isRange. This means that new values like `==1.2.0` in python will be presented as v1.2.0

If an encrypted npmToken is found alongside an unencrypted npmrc in config, then the token will replace any `${NPM_TOKEN}` placeholder found, or be appended to the end of the file. This enables large npmrc files to be defined in config without needing to enrypt the entire thing.

Closes #1796

Renovate now ignores any upgrades that are marked as deprecated, unless the current version is itself also deprecated. The new config option `ignoreDeprecated` can be set to false to disable this if necessary.

Closes #1988

Previously, deprecation warnings were done as part of dependency lookups, which were run concurrently. This meant the chance of duplicate issues was high, due to race conditions. Instead, raising the issues is done once all package are looked up, to ensure only one issue per manager/dependency. It also means we can list all of the affected package files, in case of a monorepo.

Closes #2224, Closes #2225