fix: enable strict null checks

@W-12220467@

Author: peternhale

package.json

@@ -33,29 +33,29 @@
     "!lib/**/*.map"
   ],
   "dependencies": {
-    "@salesforce/core": "^3.34.4",
+    "@salesforce/core": "^3.34.6",
     "@salesforce/ts-types": "^1.7.3",
-    "applicationinsights": "^1.4.0",
-    "axios": "^0.27.2"
+    "applicationinsights": "^2.5.1",
+    "axios": "^1.3.4"
   },
   "devDependencies": {
     "@salesforce/dev-config": "^3.0.1",
     "@salesforce/dev-scripts": "^4.1.3",
     "@salesforce/prettier-config": "^0.0.2",
     "@salesforce/ts-sinon": "^1.4.6",
-    "@typescript-eslint/eslint-plugin": "^5.45.0",
-    "@typescript-eslint/parser": "^5.56.0",
+    "@typescript-eslint/eslint-plugin": "^5.57.0",
+    "@typescript-eslint/parser": "^5.57.0",
     "chai": "^4.3.7",
-    "eslint": "^8.36.0",
+    "eslint": "^8.37.0",
     "eslint-config-prettier": "^8.8.0",
     "eslint-config-salesforce": "^1.1.1",
     "eslint-config-salesforce-license": "^0.2.0",
     "eslint-config-salesforce-typescript": "^1.1.1",
     "eslint-plugin-header": "^3.0.0",
     "eslint-plugin-import": "2.27.5",
-    "eslint-plugin-jsdoc": "^39.9.1",
-    "husky": "^7.0.4",
-    "mocha": "^9.1.3",
+    "eslint-plugin-jsdoc": "^40.1.1",
+    "husky": "^8.0.3",
+    "mocha": "^10.2.0",
     "nyc": "^15.1.0",
     "prettier": "^2.8.7",
     "pretty-quick": "^3.1.0",

test/tsconfig.json

@@ -1,8 +1,8 @@
 {
-  "extends": "../node_modules/@salesforce/dev-config/tsconfig",
+  "extends": "@salesforce/dev-config/tsconfig-test-strict",
   "include": ["unit/**/*.ts", "../node_modules/@types/**/*.d.ts"],
   "compilerOptions": {
     "noEmit": true,
     "skipLibCheck": true
   }
-}
+}