requirement to dep chart for ruby and perl

gistfile1.txt

```
depends_on :ruby => "2.3"
depends_on :ruby => "2.2"
depends_on :ruby => "2.1"
```
into
```
depends_on "ruby" if MacOS.version <= :sierra
```

```
depends_on :ruby => "2.0"
depends_on :ruby => "1.9"
```
into
```
depends_on "ruby" if MacOS.version <= :mountain_lion
```

```
depends_on :ruby => "1.8"
```
into

nothing (since even Tiger had 1.8)


@commitay do you want to handle the `:perl` ones too?

OS X 10.6 had 5.10
OS X 10.8, OS X 10.7 had 5.12.4
OS X 10.9 had 5.16.2
OS X 10.10, OS X 10.11, macOS 10.12, macOS 10.13 have 5.18.2

```
5.26 => depends_on "perl"
5.25 => depends_on "perl"
5.24 => depends_on "perl"
5.23 => depends_on "perl"
5.22 => depends_on "perl"
5.21 => depends_on "perl"
5.20 => depends_on "perl"
5.19 => depends_on "perl" 
5.18 => depends_on "perl" if MacOS.version <= :mavericks
5.17 => depends_on "perl" if MacOS.version <= :mavericks
5.16 => depends_on "perl" if MacOS.version <= :mountain_lion
5.15 => depends_on "perl" if MacOS.version <= :mountain_lion
5.14 => depends_on "perl" if MacOS.version <= :mountain_lion
5.13 => depends_on "perl" if MacOS.version <= :mountain_lion
5.12 => depends_on "perl" if MacOS.version <= :snow_leopard
5.11 => depends_on "perl" if MacOS.version <= :snow_leopard
5.10 => nothing
5.9 => nothing
5.8 => nothing
5.7 => nothing
5.6 => nothing
5.5 => nothing
5.4 => nothing
5.3 => nothing
```