bug(dts-merge): on windows platform

[Stradivario]

                console.log(` ${process.cwd()}${namespace} --project ${process.cwd()}${projectPath} --out ${process.cwd()}${outPath}`)
                this.logger.log('Typescript merging definitions started in child process...\n');
                this.child = childProcess.spawn(`cmd`, [
		    '/s',
		    ' /c',
            `${this.node_modules}/.bin/rxdi-merge --name ${process.cwd()}${namespace} --project ${process.cwd()}${projectPath} --out ${process.cwd()}${outPath}`,
                ], {cwd});

1543768267912 Typescript merging definitions started in child process...

Error: spawn rxdi-merge ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:232:19)
    at onErrorNT (internal/child_process.js:407:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)

https://github.com/rxdi/deploy/blob/master/app/services/dts-generator/dts-generator.service.js#L53

When trying to run dts-merge on windows platform it brakes because arguments passed to the program are not resolved correctly. Implementation would be to take RAW module dts and put it directly inside the code without spawning child process or to think about how to get paths and pass paths better.