Fix number conversion

tests/UtilsTest.ts

@@ -0,0 +1,25 @@
+import { it, describe } from 'mocha';
+import { expect } from 'chai';
+import { getNumber } from '../src/utils';
+
+describe('Utils', function() {
+    it('Can parse positive number', function() {
+        const text = '123';
+        expect(getNumber(text)).to.be.equals(123);
+    });
+
+    it('Can parse positive number with noise', function() {
+        const text = '  123 ';
+        expect(getNumber(text)).to.be.equals(123);
+    });
+
+    it('Can parse negative number', function() {
+        const text = '-‭146';
+        expect(getNumber(text)).to.be.equals(-146);
+    });
+
+    it('Can parse negative number with minus sign', function() {
+        const text = '\u2212132';
+        expect(getNumber(text)).to.be.equals(-132);
+    });
+});