release 0.8.3-rc.2 (#330)

## High Level Overview of Change

This release removed database calls to fetch validators to avoid
swamping database with multiple requests on each validation.

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### Context of Change

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### Type of Change

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- [ ] Bug fix (non-breaking change which fixes an issue)
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- [x] Release

## Before / After

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## Test Plan

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Author: Patel-Raj

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "validator-history-service",
-  "version": "0.8.2",
+  "version": "0.8.3-rc.2",
   "description": "Service for ingesting, aggregating, storing, and disbursing validation related data",
   "main": "./build/index.js",
   "scripts": {