This commit adds a `packs` option to the codeql-config.yml file. Users
can specify a list of ql packs to include in the analysis.
For a single language analysis, the packs property looks like this:
```yaml
packs:
- pack-scope/pack-name1@1.2.3
- pack-scope/pack-name2 # no explicit version means download the latest
```
For multi-language analysis, you must key the packs block by lanaguage:
```yaml
packs:
cpp:
- pack-scope/pack-name1@1.2.3
- pack-scope/pack-name2
java:
- pack-scope/pack-name3@1.2.3
- pack-scope/pack-name4
```
This implementation adds a new analysis run (alongside custom and
builtin runs). The unit tests indicate that the correct commands are
being run, but I have not actually tried this with a real CLI.
Also, convert `instanceof Array` to `Array.isArray` since that is
sightly better in some situations. See:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray#instanceof_vs_isarray
Adds an empty changelog file and a reminder to update it when opening
pull requests.
Also, adds a 1.0.0 version number in the package.json, which is what
we _could_ use for version numbering.
This version will count lines of code in each file serially. It still
runs all file system operations asynchronously. The only difference now
is that it will only count one file at a time. It is slower, but it
is able to count large repositories without running out of memory.
