chore(deps): update dependency @types/mocha to v8 (census-instrumentation#817)

Co-authored-by: renovate[bot] <renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

packages/opencensus-core/package-lock.json

@@ -53,7 +53,7 @@
   },
   "devDependencies": {
     "@types/continuation-local-storage": "3.2.1",
-    "@types/mocha": "7.0.2",
+    "@types/mocha": "8.2.3",
     "@types/node": "10.17.60",
     "@types/once": "1.4.0",
     "@types/semver": "7.3.7",

packages/opencensus-core/package.json

@@ -20,7 +20,7 @@
   },
   "devDependencies": {
     "@types/chai": "4.2.21",
-    "@types/mocha": "7.0.2",
+    "@types/mocha": "8.2.3",
     "@types/node": "10.17.60",
     "chai": "4.3.4",
     "fs": "0.0.1-security",

packages/opencensus-exporter-azure/package-lock.json

@@ -50,7 +50,7 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "7.0.2",
+    "@types/mocha": "8.2.3",
     "@types/nock": "10.0.3",
     "@types/node": "10.17.60",
     "codecov": "3.8.3",

packages/opencensus-exporter-azure/package.json

@@ -49,7 +49,7 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "7.0.2",
+    "@types/mocha": "8.2.3",
     "@types/nock": "10.0.3",
     "@types/node": "10.17.60",
     "codecov": "3.8.3",

packages/opencensus-exporter-instana/package-lock.json

@@ -49,7 +49,7 @@
     "access": "public"
   },
   "devDependencies": {
-    "@types/mocha": "7.0.2",
+    "@types/mocha": "8.2.3",
     "@types/nock": "10.0.3",
     "@types/node": "10.17.60",
     "codecov": "3.8.3",