Improvements
* Add support for specifying the language name returned for hover requests, ref [Fortran IntelliSense 17](https://github.com/hansec/vscode-fortran-ls/issues/17)
* Add support for submodule implementations using the "PROCEDURE" keyword, fixes [152](https://github.com/hansec/fortran-language-server/issues/152)
Fixes
* Fix bug with keywords in old style function declarations, fixes [154](https://github.com/hansec/fortran-language-server/issues/154)
* Fix bug when searching an empty scope, fixes [151](https://github.com/hansec/fortran-language-server/issues/151)
* Remove erroneous double definition/masking checks for interfaces, fixes [18](https://github.com/hansec/fortran-language-server/issues/18) and [138](https://github.com/hansec/fortran-language-server/issues/138)
* README: Add fix for possible installation error