Add types for bayes-classifier (#37337)

* Add types for bayes-classifier

* Address review

* Address review

types/bayes-classifier/bayes-classifier-tests.ts

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+import BayesClassifier = require('bayes-classifier');
+
+const classifier = new BayesClassifier();
+
+const positiveDocuments = [
+    `I love tacos.`,
+    `Dude, that burrito was epic!`,
+    `Holy cow, these nachos are so good and tasty.`,
+    `I am drooling over the awesome bean and cheese quesadillas.`,
+];
+
+const negativeDocuments = [
+    `Gross, worst taco ever.`,
+    `The buritos gave me horrible diarrhea.`,
+    `I'm going to puke if I eat another bad nacho.`,
+    `I'd rather die than eat those nasty enchiladas.`,
+];
+
+classifier.addDocuments(positiveDocuments, `positive`);
+classifier.addDocuments(negativeDocuments, `negative`);
+
+classifier.train();
+
+classifier.classify(`I heard the mexican restaurant is great!`); // "positive"
+classifier.classify(`I don't want to eat there again.`); // "negative"
+classifier.classify(`The torta is epicly bad.`); // "negative"
+classifier.classify(`The torta is tasty.`); // "positive"
+
+classifier.getClassifications(`Burritos are the meaning of life.`);
+/*
+ [ { label: 'positive', value: 0.22222222222222224 },
+   { label: 'negative', value: 0.11111111111111112 } ]
+*/

types/bayes-classifier/index.d.ts

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+// Type definitions for bayes-classifier 0.0
+// Project: https://github.com/miguelmota/bayes-classifier
+// Definitions by: Jason Harrison <https://github.com/jasonharrison>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 3.5
+
+interface Classifications {
+    label: string;
+    value: number;
+}
+
+declare class BayesClassifier {
+    constructor();
+
+    addDocument(doc: string, label: string): void;
+
+    addDocuments(docs: string[], label: string): void;
+
+    classify(doc: string): string;
+
+    getClassifications(doc: string): Classifications;
+
+    restore(classifier: any): void;
+
+    train(): void;
+}
+
+export = BayesClassifier;

types/bayes-classifier/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "bayes-classifier-tests.ts"
+    ]
+}

types/bayes-classifier/tslint.json

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+{
+    "extends": "dtslint/dt.json"
+}